Document:

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                                                                   EXHIBIT 10.27

                      Dated the ___ day of __________ 2000

                          DERAMORE HOLDINGS LIMITED (1)

                                       and

                      PIVOTAL CORPORATION (NI) LIMITED (2)

                                       and

                             PIVOTAL CORPORATION (3)

                                      LEASE
                                       of

                           Third Floor, Capital House,
                         3 Upper Queen Street, Belfast.

                                 KEARNEY SEFTON
                                   Solicitors,
                              12 Brunswick Street,
                                    BELFAST,
                                    BT2 7GE

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                    LEASE: Dated    day of             2000

<TABLE>
<S>     <C>     <C>                         <C>
1.      PARTICULARS

        1.1.1   The Landlord                DERAMORE HOLDINGS LIMITED
                                            having its registered office at
                                            160 Brompton Road, Knightsbridge,
                                            London SW3 1RP

        1.1.2   The Tenant                  PIVOTAL CORPORATION (NI) LIMITED
                                            having its registered office at
                                            50 Bedford Street, Belfast, BT2 7FU

        1.1.3   The Guarantor               PIVOTAL CORPORATION having its
                                            registered office at
                                            224 West Esplanade, Suite 300 North,
                                            Vancouver, British Columbia,
                                            VYM 3M6, Canada

        1.2     The Building                The building (including the car
                                            park and yard to the rear thereof)
                                            known as Capital House,
                                            3 Upper Queen Street, Belfast shown
                                            (for the purposes of identification
                                            only) edged [blue] on the Plan

        1.3     The Premises                The third floor of the Building as
                                            the same is more particularly
                                            defined in the First Schedule

        1.4     Total Lettable Area         9,648 square feet
                of the Premises

        1.5     Term                        10 years from and including the
                                            17th day of April 2000 subject to
                                            clause 10.16

        1.6.1   First Rent Commencement     17th day of May 2000
                Date
</TABLE>

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<TABLE>
<S>     <C>     <C>                         <C>
        1.6.2   Second Rent Commencement    17th day of October 2000
                Date

        1.7     Initial Rent                Pound Sterling 115,776.00 per annum.

        1.8     Review Date                 17th day of April 2005

        1.9     Interest Rate               4% per cent per annum above
                                            the Base Rate of the Bank of
                                            Ireland (or some other bank
                                            nominated in writing from time
                                            to time by the Landlord)

        1.10    Permitted Hours             7am to 7pm Monday to Friday
                                            inclusive

        1.11    Decorating Year             2005

        1.12    Service Charge              the amount referred to in clause 7.4

        1.13    Insurance Rent              a reasonable proportion (as
                                            determined by the Surveyor) of
                                            the sums which the Landlord
                                            shall from time to time reasonably
                                            pay by way of premiums for
                                            insuring the Building against the
                                            risks set out in clauses 8.3(a), (b)
                                            and (d),

                                            (b) all of any increased premium
                                            payable by any act or omission of
                                            the Tenant or by the user carried
                                            out by the Tenant on the Premises,
                                            and

                                            (c) all the reasonable premium
                                            that the Landlord shall from time
                                            to time pay (or where such
                                            insurance includes other premises,
                                            a reasonable proportion of such
                                            premium to be determined by the

</TABLE>

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<TABLE>
<S>     <C>     <C>                         <C>
                                            Surveyor acting as an expert and not
                                            as an arbitrator) for insuring
                                            against the loss of Rent and Service
                                            Charge in accordance with
                                            clause 8.3(c).

</TABLE>

2.      DEFINITIONS

        2.1     The terms defined in this clause and in the Particulars shall
                for all purposes of this Lease have the meanings specified.

        2.2     'the Plan' means the plan and drawings referred to in the First
                Schedule and annexed to this Lease.

        2.3     'Rent' means the Initial Rent and the rents ascertained in
                accordance with the Fourth Schedule and such term includes
                neither the Service Charge nor the Insurance Rent but the term
                'rents' includes Rent, the Service Charge, and the Insurance
                Rent.

        2.4     'Pipes' means pipes, sewers, drains, mains, ducts, conduits,
                gutters, watercourses, wire cables, channels, subways, flues and
                all other conducting media, including any fixings, louvres,
                cowls and other covers.

        2.5     'the Services' mean the services set out in the Sixth Schedule.

        2.6     'the Annual Expenditure' means:

                (a)     all reasonable costs expenses and outgoings whatsoever
                        reasonably incurred by the Landlord in providing all or
                        any of the Services; and

                (b)     all sums reasonably incurred by the Landlord in relation
                        to the items set out in the Seventh Schedule;

                and any VAT payable thereon ('the Costs') (including any of the
                Costs incurred by a third party such as (without prejudice to
                the generality of the foregoing) the Surveyor or the managing
                agents where the Costs have been incurred for and on behalf of
                the Landlord and where the Landlord is liable to re-imburse the
                third party for the Costs) Provided that the Annual Expenditure
                shall not include any costs for the Building with respect to the
                employment of security staff at the main entrance to the
                Building outside the hours from 6.30a.m. to 7.30p.m.

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                Monday to Friday inclusive save where the Landlord reasonably
                incurs such security costs outside the aforesaid hours acting in
                accordance with the principles of good estate management.

        2.7     'the Common Parts' mean the entrance halls, landings, lift
                shafts, staircases, passages, service yard, car park and any
                other areas which are from time to time during the Term provided
                by the Landlord for common use and enjoyment by the tenants and
                occupiers of the Building and all persons expressly or by
                implication authorised by them.

        2.8     'the Retained Parts' mean all parts of the Building not let or
                intended to be let to a tenant including (but without prejudice
                to the generality of the foregoing):

                (a)     the Common Parts;

                (b)     office accommodation for security and any ancillary
                        staff;

                (c)     all Pipes in on or serving the Building except any that
                        are within and solely serve premises let or intended to
                        be let;

                (d)     such parts of the Building including (again without
                        prejudice to the generality of the foregoing) those
                        parts of the walls foundations and roofs not let or
                        intended to be let to a tenant;

                (e)     the windows and window frames serving the Premises.

        2.9     'Interest' means interest during the period from the date on
                which the payment is due to the date of payment, both before and
                after any judgment, at the Interest Rate then prevailing or
                should the Base Rate referred to in clause 1.9 cease to exist,
                such other rate of interest as is most closely comparable with
                the Interest Rate to be agreed between the parties or in default
                of agreement to be determined by the Accountant acting as an
                expert and not as an arbitrator.

        2.10    'the Planning Acts' means the Planning (Northern Ireland) Order
                1991 and all statutes regulations and orders included by virtue
                of clause 3.14.

        2.11    'Insured Risk' means any risk against which the Landlord shall
                at the time of the damage or destruction in question have
                effected insurance.

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        2.12    'the Office Covenants' mean the covenants set out in the Fifth
                Schedule.

        2.13    'the Surveyor' means any suitably qualified person or firm
                appointed by or acting for the Landlord (including an employee
                of the Landlord or a Group Company and including the person or
                firm appointed by the Landlord to collect the rents and manage
                the Building) to perform the function of a surveyor for any
                purpose of this Lease.

        2.14    'the Accountant' means any suitably qualified person or firm
                appointed by or acting for the Landlord (including an employee
                of the Landlord or a Group Company and including the person or
                firm appointed by the Landlord to collect the rents and manage
                the Building) to perform the function of an accountant for the
                purpose of this Lease.

        2.15    'Adjoining Property' means any neighbouring or adjoining land or
                property in which the Landlord or a Group Company has a freehold
                or leasehold interest or in which during the Term the Landlord
                (or a Group Company) shall have acquired a freehold or leasehold
                interest.

        2.16    'the Other Buildings' shall mean all buildings now or at any
                time during the Term erected on the Adjoining Property.

        2.17    'the 1996 Order' means the Business Tenancies (Northern Ireland)
                Order 1996.

        2.18    'Group Company' means a company that is a member of the same
                Group as the Landlord within the meaning of article 31 of the
                1996 Order.

3.      INTERPRETATION

        3.1     The expressions 'the Landlord' and 'the Tenant' wherever the
                context so admits include their reactive successors in title.

        3.2     Where the Landlord the Tenant or the Guarantor for the time
                being are two or more individuals the terms 'the Landlord', 'the
                Tenant' and 'the Guarantor' include the plural number and
                obligations expressed or implied to be made by or with such
                party are deemed to be made by or with such individuals jointly
                and severally.

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        3.3     Words importing the one gender include all other genders and
                words importing the singular include the plural and vice versa.

        3.4     The expression 'the Guarantor' includes any person who enters
                into covenants with the Landlord pursuant to clause 5.21.

        3.5     The expression 'the Term' in relation to clause 9 includes any
                period of holding over or extension or continuance thereof
                whether by statute or common law and elsewhere in this Lease the
                said expression includes such period where the context so
                admits.

        3.6     References to 'the last year of the Term' include the last year
                of the Term if the same shall determine otherwise than by
                effluxion of time and to 'the expiration of the Term' include
                such sooner determination of the Term

        3.7     References to any right of the Landlord to have access to the
                Premises shall be construed as extending to all persons properly
                authorised by the Landlord (including agents, professional
                advisers, contractors, workmen and others).

        3.8     References to 'the Premises' in the absence of any provision to
                the contrary include any part thereof.

        3.9     Any covenant by the Tenant not to do an act or thing shall be
                deemed to include an obligation not to permit such act or thing
                to be done and to use all reasonable endeavours to prevent such
                act or thing being done by a third party.

        3.10    Whenever the consent or approval of the Landlord is required or
                requested in relation to this Lease, such provisions shall be
                construed as also requiring the consent or approval of any
                mortgagee of the Premises where the same shall be required
                except that nothing in this Lease shall be construed as implying
                that any obligation is imposed upon any mortgagee not
                unreasonably to refuse any such consent.

        3.11    References to 'consent of the Landlord' or words to similar
                effect mean a consent in writing signed by or on behalf of the
                Landlord and to 'approved' and 'authorised' or words to similar
                effect mean (as the case may be) approved or authorised in
                writing by or on behalf of the Landlord.

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        3.12    The terms 'the parties' or 'party' shall mean the Landlord
                and/or the Tenant but except where there is an express
                indication to the contrary shall exclude the Guarantor.

        3.13    'Development' has the meaning given by Article 11 of the
                Planning (Northern Ireland) Order 1991.

        3.14    Any reference to a specific statute includes any statute which
                that statute has directly or indirectly replaced (with or
                without modification) and any statutory extension or
                modification or re-enactment of such statute and any regulations
                or orders made thereunder and any general reference to 'statute'
                or 'statutes' includes any regulations or orders made
                thereunder.

        3.15    The paragraph headings do not form part of this Lease and shall
                not be taken into account in its construction or interpretation.

4.      DEMISE

        The Landlord DEMISES to the Tenant the Premises TOGETHER WITH the rights
        specified in the Second Schedule but EXCEPTING AND RESERVING to the
        Landlord the rights specified in the Third Schedule TO HOLD the Premises
        to the Tenant for the Term SUBJECT TO all rights easements privileges
        restrictions covenants and stipulations of whatever nature affecting the
        Premises YIELDING AND PAYING to the Landlord:

        (a)     the Rent, payable without any deduction by equal quarterly
                payments in advance on the first days of February, May, August
                and November in every year, and proportionately for any period
                of less than a year, a proportionate sum in respect of the
                period from and including the Second Rent Commencement Date to
                and including the day before the quarter day next thereafter to
                be paid on the Second Rent Commencement Date Provided Always
                that the Tenant shall pay an abated Rent at the rate of Pounds
                Sterling 54,996.00 per annum for the period from and including
                the First Rent Commencement Date to the day immediately prior to
                the Second Rent Commencement Date, such abated Rent to be
                payable without any deduction by equal quarterly payments in
                advance on the aforesaid quarter days, and proportionately for
                any period of less than a year, the first such payment being a
                proportionate sum in respect of the period from and including
                the First Rent Commencement Date to and including the day

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                before the quarter day next thereafter to be paid on the First
                Rent Commencement Date hereof, and

        (b)     by way of further rent, the Service Charge payable on demand in
                accordance with clause 7 and the Insurance Rent payable on
                demand in accordance with clause 8.

5.      The Tenant COVENANTS with the Landlord:

        Rent

        5.1     To pay the rents on the days and in the manner set out in clause
                4.

        Outgoings and VAT

        5.2     To pay and to indemnify the Landlord against:

                (a)     all rates, taxes, assessments, duties, charges,
                        impositions and outgoings which are now or during the
                        Term shall be, charged, assessed or imposed upon the
                        Premises or upon the owner or occupier of them save
                        taxes arising from the receipt of rents or from dealings
                        with the Landlord's reversionary interest in the
                        Premises or the Building;

                (b)     Value Added Tax (or any tax of a similar nature that may
                        be substituted for it, or levied in addition to it)
                        chargeable in respect of any payment made by the Tenant
                        under any of the provisions of or in connection with
                        this Lease, or paid by the Landlord on any payment made
                        by the Landlord where the Tenant agrees in this Lease to
                        reimburse the Landlord for such payment.

        Electricity, Gas and Other Services Consumed

        5.3     To pay to the suppliers and to indemnify the Landlord against
                all charges for electricity, gas and other services consumed or
                used at or in relation to the Premises (including meter rents)
                where a separate supply is provided for the Premises.

        Repair

        5.4     To repair and keep in repair the Premises (damage caused by an
                inherent or latent structural defect in the Building or Insured
                Risk

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                excepted other than to the extent that the insurance monies are
                irrecoverable in consequence of any act or default of the Tenant
                or anyone at the Premises expressly or by implication with the
                Tenant's authority) and to replace from time to time the
                Landlord's fixtures, fittings and appurtenances in the Premises
                which may be or become beyond repair at any time during or at
                the expiration of the Term.

        Alterations and Additions

        5.5.1   Not to:

                (a)     commit or permit waste, on or at the Premises;

                (b)     build, erect, construct or place any new or additional
                        building or structure on the Premises, including
                        (without prejudice to the generality of the foregoing)
                        any hut, shed, garage, cycle shelter, store, caravan,
                        house on wheels, or any temporary or moveable building
                        or structure;

                (c)     make any alterations, additions or improvements to the
                        Premises provided that:

                        (i)     internal non-structural alterations by the
                                Tenant in the Premises of a design and of
                                materials approved in writing by the Landlord
                                (such approval not to be unreasonably withheld
                                or delayed) shall not be deemed to be a breach
                                of this covenant; and

                        (ii)    the Tenant may with the consent of the Landlord
                                (such consent not to be unreasonably withheld or
                                delayed) install and alter internal partitions
                                from time to time and install new partitions.

        5.5.2   To remove any additional buildings, additions, alterations or
                improvements made to the Premises at the expiration of the Term
                if so requested by the Landlord and to make good any part or
                parts of the Premises which may be damaged by such removal.

        5.5.3   Not to cut injure or remove nor, except in accordance with
                clause 5.5.4, make any connection with the Pipes serving the
                Premises either exclusively or in conjunction with other
                premises.

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5.5.4       To make connection with those Pipes that exclusively serve the
            Premises only in accordance with plans and specifications approved
            by the Landlord (such approval not to be unreasonably withheld or
            delayed).

Statutory Obligations

5.6.1       At the Tenant's own expense, to execute all works and provide and
            maintain all arrangements upon or in respect of the Premises or the
            use to which the Premises are being put that are required (whether
            by the lessor, the lessee or the occupier) in order to comply with
            the requirements of any statute (already or in the future to be
            passed) or any government department, local authority, other public
            or competent authority, or court of competent jurisdiction.

5.6.2       Not to do in or near the Premises any act or thing by reason of
            which the Landlord may under any enactment incur, have imposed upon
            it, or become liable to pay any penalty, damages, compensation,
            costs, charges or expenses.

5.6.3       Without prejudice to the generality of the foregoing, to comply in
            all respects with the provisions of any statutes and any other
            obligations imposed by law or by any byelaws applicable to the
            Premises or in regard to carrying on the trade or business for the
            time being carried on by the Tenant on the Premises.

Access of Landlord and Notice to Repair

5.7.1       To permit the Landlord:

            (a)   to enter upon the Premises for the purpose of ascertaining
                  that the covenants and conditions of this Lease have been
                  observed and performed;

            (b)   to view (and to open up floors and ceiling where the same is
                  reasonably required in order to view) the state of repair and
                  condition of the Premises; and

            (c)   to give to the Tenant (or leave upon the Premises) a notice
                  specifying any repairs, cleaning, maintenance and painting
                  that the Tenant has failed to execute in breach of the terms
                  hereof and to request the Tenant forthwith to execute the same
                  including the making good of the said opening-up (if any)

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                  provided that any such opening-up shall be made good by and at
                  the cost of the Landlord where the same reveals no breaches of
                  the terms hereof which justified such opening up.

5.7.2       Forthwith to repair, cleanse, maintain and paint the Premises as
            required by such notice.

5.7.3       If within one month of the service of such a notice, the Tenant
            shall not have commenced and be proceeding diligently with the
            execution of the work referred to in the notice, or shall fail to
            complete the work within a reasonable time or if in the Landlord's
            Surveyor's reasonable opinion the Tenant is unlikely to have
            completed the work by the date upon which the work has to be
            completed to permit the Landlord to enter the Premises to execute
            such work as may be necessary to comply with the notice, and to pay
            to the Landlord the cost of so doing and all expenses incurred by
            the Landlord (including legal. costs and surveyor's fees) within
            fourteen days of a written demand.

Alienation

5.8.1       Not to hold on trust for another, part with or share the possession
            or occupation of the whole of the Premises except as permitted under
            clause 5.8.2 hereof.

5.8.2       Not to assign, underlet (save as permitted under clause 5.8.4
            hereof), charge, hold on trust for another, part with nor share
            possession or occupation of part only of the Premises save that the
            Tenant may share occupation of the Premises or part or parts thereof
            with other group companies of the Tenant as defined by Article 31 of
            the Business Tenancies (Northern Ireland) Order 1996.

5.8.3       Not to assign nor charge the whole of the Premises without the prior
            written consent of the Landlord, such consent not to be unreasonably
            withheld or delayed, provided that the proposed assignee is of good
            financial standing and proved to be such to the reasonable
            satisfaction of the Landlord

5.8.4       Not to underlet the whole or part of the Premises without the prior
            written consent of the Landlord (such consent not to be unreasonably
            withheld or delayed) provided that the proposed sub-tenant is of
            good financial standing and proved to be such to the reasonable
            satisfaction of the Landlord PROVIDED ALWAYS that each such
            underletting of part of the Premises must comprise the entire part
            of the third floor

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            hereby demised which is located on either side of the lifts/main
            stairs/toilet area on the said floors.

5.8.5       Prior to any permitted assignment, to procure that the assignee
            enters into direct covenants with the Landlord to perform and
            observe all the Tenant's covenants and all other provisions during
            the residue of the Term.

5.8.6       Prior to any permitted underletting, to procure that the underlessee
            enters into direct covenants with the Landlord as follows:

            (a)   to observe and perform all the Tenant's covenants and all
                  other provisions of this Lease (other than the payment of
                  rents) during the residue of the Term;

            (b)   an unqualified covenant by the underlessee that the
                  underlessee will not assign, underlet, charge, hold on trust
                  for another, part with nor share the possession or occupation
                  of part only of the underlet premises or underlet, charge,
                  hold on trust for another, part with nor share the possession
                  or occupation of the whole of the underlet premises; and

            (c)   a covenant by the underlessee that the underlessee will not
                  assign the whole of the premises demised by the said
                  underlessee without obtaining the prior written consent (which
                  shall not be unreasonably withheld) of the Landlord under this
                  Lease.

5.8.7       That each and every permitted underlease shall be granted without
            any fine or premium, at a rent equal to the then open market rental
            value of the Premises or the proportionate part thereof where part
            of the Premises is underlet (such rental value to be assessed in
            accordance with the provisions of the Fourth Schedule of this Lease)
            or if greater the Rent then being paid or the proportionate part of
            the Rent then being paid where only part of the Premises is underlet
            such rent being payable in advance on the days on which Rent is
            payable under this Lease, and shall contain provisions approved by
            the Landlord:

            (a)   for the upwards only review of the rent thereby reserved on
                  the basis and on the dates on which the rent is to be reviewed
                  in this Lease;

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            (b)   prohibiting the underlessee from doing or allowing any act or
                  thing in relation to the underlet premises inconsistent with
                  or in breach of the provisions of this Lease;

            (c)   a condition for re-entry by the underlessor on breach of any
                  covenant by the underlessee, and

            (d)   an absolute covenant against underletting and the same
                  restrictions on assignment charging holding on trust for
                  another parting with or sharing with another possession
                  occupation of the underlet premises and the same provisions
                  for direct covenants and registration as in this Lease.

5.8.8       To enforce the performance and observance by every such underlessee
            of the provisions of the underlease and not at any time either
            expressly or by implication to waive any breach of the covenants or
            conditions on the part of any underlessee or assignee of any
            underlease nor (without the consent of the Landlord such consent not
            to be unreasonably withheld) vary the terms or accept a surrender of
            any permitted underlease.

Nuisance etc and Residential Restrictions

5.9.1       Not to do (or permit or suffer to remain upon the Premises) anything
            which may be or become or cause a nuisance, injury or damage to the
            Landlord or its tenants or the occupiers of adjacent or neighboring
            premises.

5.9.2       Not to use the Premises for a sale by auction or for any dangerous,
            noxious, noisy or offensive trade or business, nor for any illegal
            or immoral act or purpose.

5.9.3       Not to sleep or allow any person to sleep on the Premises and not to
            use the Premises for residential purposes nor keep any animal, fish,
            reptile or bird on the Premises.

Landlord's Costs

5.10        To pay to the Landlord all reasonable costs, fees, charges,
            disbursements and expenses (including without prejudice to the
            generality of the foregoing those payable to Counsel, Solicitors,
            Surveyors and bailiffs) incurred by the Landlord in relation or
            incidental to:

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            (a)   every application made by the Tenant for a consent or license
                  required or made necessary by the provisions of this Lease
                  whether the same be granted or refused or proffered subject to
                  any lawful qualification or condition or whether the
                  application be withdrawn;

            (b)   the preparation and service of notices under the 1996 Order;

            (c)   the recovery or attempted recovery of arrears of rent or other
                  sums due from the Tenant; and

            (d)   any steps taken in contemplation of or in connection with the
                  preparation and service of a Schedule of Dilapidations during
                  or after the expiration of the Term.

Planning Acts

5.11.1      To comply with the provisions and requirements of the Planning
            Acts, whether as to the Permitted User or otherwise, and to
            indemnify (both during or following the expiration of the Term) and
            keep the Landlord indemnified against all liability whatsoever
            including costs and expenses in respect of any contravention.

5.11.2      At the expense of the Tenant, to obtain all planning permissions
            and to serve all such notices as may be required for the carrying
            out of any operations or user on the Premises which may constitute
            Development, provided that no application for planning permission
            shall be made without the previous consent of the Landlord (such
            consent not to be unreasonably withheld or delayed).

5.11.3      Subject only to any statutory direction to the contrary, to pay and
            satisfy any charge or levy that may hereafter be imposed under the
            Planning Acts in respect of the carrying out or maintenance of any
            such operations, or the commencement or continuance of any such
            user.

5.11.4      Notwithstanding any consent which may be granted by the Landlord
            under this Lease, not to carry out or make any alteration or
            addition to the Premises, or any change of use until:

            (a)   all necessary notices under the Planning Acts have been served
                  and copies produced to the Landlord;

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<PAGE>   16

            (b)   all necessary permissions under the Planning Acts have been
                  obtained and produced to the Landlord; and

            (c)   the Landlord has acknowledged that every necessary planning
                  permission is acceptable to it (such acknowledgement not to be
                  unreasonably withheld or delayed);

            the Landlord being entitled to refuse to acknowledge its acceptance
            of a planning permission on the grounds that any condition contained
            in it, or anything omitted from it, or the period referred to in it,
            would in the reasonable opinion of the Surveyor) be (or be likely to
            be) prejudicial to the Landlord's interest in the Premises, the
            Building, or any Adjoining Property whether during or following the
            expiration of the Term.

5.11.5      Unless the Landlord shall otherwise direct, to carry out and
            complete before the expiration of the Term:

            (a)   any works stipulated to be carried out to the Premises by a
                  date subsequent to such expiration as a condition of any
                  planning permission granted for any Development begun before
                  the expiration of the Term; and

            (b)   any Development begun upon the Premises in respect of which
                  the Landlord shall or may be or become liable for any charge
                  or levy under the Planning Acts.

5.11.6      In any case where a planning permission is granted subject to
            conditions, and if the Landlord so requires, to provide security for
            the compliance with such conditions, and not to implement the
            planning permission until security has been provided.

5.11.7      If reasonably required by the Landlord, but at the cost of the
            Tenant, to appeal against any refusal of planning permission or the
            imposition of any conditions on a planning permission relating to
            the Premises following an application by the Tenant.

Plans Documents and Information

5.12.1      If called upon so to do, to produce to the Landlord or the Surveyor
            all plans, documents and other evidence as the Landlord may
            reasonably

                                      -15-
<PAGE>   17

            require in order to satisfy itself that the provisions of this Lease
            have been complied with.

5.12.2      If called upon so to do, to furnish to the Landlord, the Surveyor,
            any other surveyor acting for the Landlord, or any person acting as
            the Arbitrator under the Fourth Schedule, such information as may be
            reasonably requested in writing in relation to any pending or
            intended step under the 1996 Order or the implementation of the
            provisions of the Fourth Schedule.

Indemnities

5.13        To be responsible for, and to keep the Landlord fully indemnified
            against, all damage, damages, losses, costs, expenses, actions,
            demands, proceedings, claims and liabilities made against or
            suffered or incurred by the Landlord arising directly or indirectly
            out of:

            (a)   any act omission or negligence of the Tenant or its sub-
                  tenants or any persons at the Premises expressly or impliedly
                  with its or their Tenant's authority; or

            (b)   any breach or non observance by the Tenant or its sub-tenants
                  of the covenants, conditions or other provisions of this
                  Lease.

Re-letting Boards

5.14        To permit the Landlord at any time during the last six months of the
            Term to enter upon the Premises and affix and retain upon such part
            of the Premises as may be reasonable a notice for re-letting the
            same and during such period to permit persons with written
            authority of the Landlord or its agent at reasonable times of the
            day to view the Premises.

Rights of Light and Encroachments

5.15.1      Not to stop-up, darken or obstruct any windows or light belonging
            to the Building.

5.15.2      Not to permit any new window, light, opening, doorway, path
            passage, drain or other encroachment or easement to be made or
            acquired in against out of or upon the Premises and if any such

                                      -16-
<PAGE>   18
            window light opening path passage drain or other encroachment or
            easement shall be made or acquired, or attempted to be made or
            acquired, to give immediate notice to the Landlord and at the
            request and cost of the Landlord to adopt such means as may be
            reasonably required or deemed proper for preventing any such
            encroachment or the acquisition of any such easement.

Yield Up

5.16.1      At the expiration of the Term, to yield up the Premises in repair
            as required by this Lease and otherwise in accordance with the terms
            of this Lease, to give up all keys of the Premises to the Landlord,
            and to remove all lettering and signs erected by the Tenant in upon
            or near the Premises and forthwith to make good any damage caused by
            such removal.

5.16.2      If at the expiration of the Term, the Premises are not in the state
            of repair and decoration in which they should be having regard to
            the Tenant's covenants and conditions contained in this Lease, the
            Tenant shall (if so required by the Landlord) pay to the Landlord on
            demand by way of liquidated damages:

            (a)   such sum as shall be reasonably certified by the Surveyor to
                  represent in his professional opinion:

                  (i)   the cost of putting the Premises into the state of
                        repair and decoration in which they should have been had
                        the Tenant complied with the terms of this Lease; and

                  (ii)  the Rent at the rate prevailing at the expiration of the
                        Term that would have been payable under this Lease if
                        the Term had been extended for such period as is
                        necessary to put the Premises into the state of repair
                        and decoration in which they should have been; and

            (b)   the reasonable fees of the Surveyor for the preparation and
                  service of a schedule of dilapidations and the preparation and
                  issue of the said certificate.

Interest on Arrears

5.17.1      If the Tenant shall fail to pay the Rent within 14 days of the due
            date or Service Charge and/or Insurance Rent within 14 days of
            formal

                                      -17-
<PAGE>   19
            demand or any other sum due under this Lease within 14 days of
            formal demand the Tenant shall pay the Landlord Interest on the
            rents or other sum from the date when it was due to the date on
            which it is paid (and such Interest shall be deemed to be rent due
            to the Landlord).

5.17.2      Nothing in the preceding clause shall entitle the Tenant to
            withhold or delay any payment of the rents or any other sum due
            under this Lease after the date upon which it falls due, or in any
            way prejudice affect or derogate from the rights of the Landlord in
            relation to the said non-payment, including (but without prejudice
            to the generality of the foregoing) under the proviso for re-entry
            contained in this Lease.

Registration of Documents, Rent Reviews, Notices and Keys

5.18.1      Within twenty eight days of any assignment, charge, underlease or
            sub-underlease or any transmission or other devolution relating to
            the Premises, to produce for registration with the Landlord's
            Solicitor the said deed or document (or a certified copy thereof)
            and to pay the Landlord's Solicitor's charges for the registration
            of every such document.

5.18.2      Where there has been an underletting of all or part of the
            Premises, to give notice of the details of the determination of
            every rent review to the Landlord within 28 days of the
            determination.

5.18.3      To give full particulars to the Landlord of any notice direction
            order or proposal for the same made given or issued to the Tenant by
            any local or public authority within seven days of receipt, and if
            so required by the Landlord to produce it to the Landlord and (where
            such notice direction order or proposal relates to the Tenant's
            obligations under this Lease) without delay to take all necessary
            steps to comply with the notice direction or order, and at the
            request of the Landlord and at the equal joint cost of the Landlord
            and of the Tenant to make or join with the Landlord in making such
            objection or representation against or in respect of any proposal
            for a notice direction or order as the Landlord shall deem
            expedient.

5.18.4      To ensure that at all times the Landlord has written notice of the
            name, home address and home telephone number of at least one
            keyholder of the Premises.

                                      -18-

<PAGE>   20
Sale of Reversion etc

5.19        To permit upon reasonable notice at any time during the Term
            prospective purchasers of or dealers in or agents instructed in
            connection with the sale of the Landlord's reversion or of any
            interest superior to the Term to view the Premises without
            interruption providing the same are authorised in writing by the
            Landlord or its agents.

Defective Premises

5.20        To give notice to the Landlord of any defect in the Premises which
            might give rise to an obligation on the Landlord to do or refrain
            from doing any act or thing in order to comply with the provisions
            of this Lease or the duty of care imposed on the Landlord pursuant
            to the Defective Premises (NI) Order 1975 or otherwise, and at all
            times to display and maintain all notices which the Landlord may
            from time to time reasonably require to be displayed at the
            Premises.

New Guarantor

5.21        Within fourteen days of the death during the Term of any Guarantor
            or of such person becoming bankrupt or having a Receiving Order made
            against him or being a Company passing a Resolution to wind up, or
            entering into liquidation or having a receiver appointed, to give
            notice of this to the Landlord and if so required by the Landlord at
            the expense of the Tenant within twenty eight days to procure some
            other person acceptable to the Landlord (such acceptance not to be
            unreasonably withheld) to execute a guarantee in respect of the
            Tenant's obligations contained in this Lease in the form set out in
            clause 9.

Landlord's Rights

5.22        To permit the Landlord at all times during the Term to exercise
            without interruption or interference any of the rights granted to it
            by virtue of the provisions of this Lease.

Office Covenants

5.23        To observe and perform the Office Covenants.

                                      -19-

<PAGE>   21
Criminal Damage

5.24        If the Premises or any part thereof should be damaged or destroyed
            by an event for which compensation is payable under the provisions
            of the Criminal Damage (Compensation) (Northern Ireland) Order 1977
            to immediately give notice thereof to the Landlord and forthwith to
            institute a claim under the said Order and to pursue such claim
            expeditiously AND EITHER to apply all compensation paid relating to
            the Premises in rebuilding and reinstating the same pursuant to the
            Tenant's covenants herein contained making good any deficiency out
            of the Tenant's own monies OR if the Landlord so reasonably requires
            to assign its rights under any such claim and all monies payable
            thereunder and to pay to the Landlord any deficiency and if the
            amount of compensation awarded should be reduced or excluded as the
            result of the general conduct or act or neglect of the Tenant or its
            sub-tenants (if any) or anyone at or near the Premises expressly or
            by implication with its or their authority the Tenant shall pay to
            the Landlord any amount by which any compensation recoverable by the
            Landlord shall be reduced by reason of such conduct, act or neglect.

Stamp Duty and other expenses

5.25        To pay the Stamp Duty payable on this Lease and a counterpart
            thereof, the cost of registering this Lease in the Registry of Deeds
            (if applicable).

6.    LANDLORD'S COVENANTS

The Landlord COVENANTS with the Tenant:

6.1         To permit the Tenant to peaceably and quietly hold and enjoy the
            Premises without any lawful interruption or disturbance from or by
            the Landlord or any person claiming under or in trust for the
            Landlord.

6.2         So long as Pivotal Corporation (NI) Limited or any Group Company of
            Pivotal Corporation (NI) Limited is the Tenant to give to the Tenant
            immediate notice of receipt by the Landlord from the then tenant of
            the 1st and 2nd floors of the Building written notice of such
            tenant's intention to exercise any option to terminate its Lease of
            the said 1st and 2nd floors.

6.3         Subject to the Tenant paying any relevant costs under clause 7.9 to
            ensure that the Tenant may use the Premises and have access thereto
            at all times

                                      -20-
<PAGE>   22
so far as same lies within the Landlord's control such access to include access
through the main entrance from Upper Queen Street.

7.      SERVICES

        7.1     The Landlord covenants with the Tenant to perform the Services
                throughout the Term provided that the Landlord shall not be
                liable to the Tenant in respect of:

                (a)     any failure or interruption in any of the Services by
                        reason of necessary repair, replacement, maintenance of
                        any installations or apparatus, or their damage or
                        destruction, or by reason of mechanical or other defect
                        or breakdown, or frost or other inclement conditions, or
                        shortage of fuel, materials, water or labour, or any
                        other cause beyond the Landlord's control; and

                (b)     any act, omission, or negligence of any porter,
                        attendant or other person undertaking the Services or
                        any of them on behalf of the Landlord.

        7.2     For the purposes of this clause:

                (a)     'Computing Date' means the 31st January in every year
                        of the Term or such other date as the Landlord may from
                        time to time nominate; and

                (b)     'Financial Year' means the period;

                        (i)     from the commencement of the term to (and
                                including) the first Computing Date and
                                thereafter;

                        (ii)    between two consecutive Computing Dates
                                (excluding the first but including the second
                                Computing Date in the period).

                (c)     'Due Proportion' means the due proportion (subject to
                        clause 7.7) of the Annual Expenditure payable by the
                        Tenant equivalent to the same proportion pro rata as the
                        Total Lettable Area of the Premises bears to the total
                        lettable area of the Building (excluding any ground
                        floor premises) provided that in calculating the Due
                        Proportion the Tenant shall not be

                                      -21-
<PAGE>   23

                        responsible to contribute towards costs incurred as a
                        result of inherent or latent structural defects in the
                        Building.

        7.3     The Landlord or its surveyor or other nominated agent shall as
                soon as convenient after each Computing Date prepare an account
                showing the Annual Expenditure for that Financial Year, and
                containing a fair summary of the expenditure referred to
                therein, and same shall (in the absence of manifest error) be
                conclusive evidence for the purposes of this Lease of all
                matters of fact referred to in the said account.

        7.4     The Tenant shall pay for the period from the commencement date
                of the Term to the next Computing Date an initial provisional
                Service Charge in respect of the Due Proportion (calculated upon
                an estimate by the Surveyor acting as an expert and not as an
                arbitrator of what the Annual Expenditure is likely to be for
                the current Financial Year), the first payment being a
                proportionate sum in respect of the period from and including
                the commencement date of the Term to and including the day
                before the next quarter day to be paid on the date hereof, the
                subsequent payments to be made in advance on the usual quarter
                days in respect of the said quarters.

        7.5     The Tenant shall pay for the next and each subsequent Financial
                Year a provisional sum in respect of the Due Proportion
                (calculated upon an estimate by the Surveyor acting as an expert
                and not as an arbitrator of the Annual Expenditure is likely to
                be for that Financial Year) by four equal quarterly payments on
                the usual quarter days.

        7.6     If the Service Charge for any Financial Year shall:

                (a)     exceed the provisional sum for that Financial Year the
                        excess shall be due to the Landlord on demand; or

                (b)     be less than the said provisional sum the overpayment
                        shall be credited to the Tenant against the next
                        quarterly payment of the Rent and Service Charge.

        7.7     If at any time during the Term the total property enjoying or
                capable of enjoying the benefit of any of the Services be
                increased or decreased on a permanent basis, or the benefit of
                any of the Services be extended on like basis to any adjoining
                or neighbouring property, the Due Proportion shall be varied
                with effect from the Computing Date following such event by
                agreement between the parties, or in default of agreement within
                three months of the first proposal for variation

                                      -22-
<PAGE>   24

                made by either party as shall be determined to be a fair and
                reasonable variation reflecting the event in question by the
                Surveyor (acting as an expert and not as an arbitrator) except
                that nothing herein contained shall imply an obligation on the
                part of the Landlord to provide the Services to any adjoining or
                neighbouring property.

        7.8     The Landlord may withhold, add to, extend, vary or make any
                alteration in the rendering of the Services, or any of them,
                from time to time if the Landlord at its discretion deems it
                desirable to do so the Landlord acting at all times in the
                interests of good estates management.

        7.9     In the event that following a request by the Tenant and
                agreement to such request by the Landlord (such request not to
                be unreasonably refused provided that the Landlord shall not
                refuse the Tenant's request for Services outside the Permitted
                Hours which are reasonably required for the use of the Premises
                outside the Permitted Hours including (without prejudice to the
                generality of the foregoing) lifts) (and as the case may be
                following any request by and agreement with any other tenant(s)
                in the Building (excluding any ground floor premises)) the
                Landlord provides any Services or incurs any Additional Items of
                Expenditure outside the Permitted Hours then the Tenant shall be
                responsible and liable to pay for all extra Costs (including any
                VAT payable thereon) to the Annual Expenditure as a result of
                the use of the Premises outside the Permitted Hours or a
                reasonable proportion (to be decided by the Surveyor acting as
                an expert and not as an arbitrator) of such extra Costs where
                any other tenant(s) in the Building (excluding any ground floor
                premises) also use their premises outside the Permitted Hours.

8.      INSURANCE

        8.1     The Tenant warrants that prior to the execution of this Lease it
                has disclosed to the Landlord in writing any conviction,
                judgment, or finding of any court or tribunal relating to the
                Tenant (or any director, other officer, or major shareholder of
                the Tenant) of such a nature as to be likely to affect the
                decision of any insurer or underwriter to grant or to continue
                insurance of any of the risks appearing in this clause.

        8.2     Subject to the Tenant paying the Insurance Rent, the Landlord
                covenants to insure the Building subject to such excesses
                exclusions or limitations as the Landlord's insurers may
                require;

                                      -23-
<PAGE>   25

                in such insurance office or with such underwriters and through
                such agency and for such amount as in the reasonable opinion of
                the Landlord from time to time represents the full cost of
                rebuilding or reinstatement including architects', surveyors'
                and other professional fees, the cost of debris removal,
                demolition, site clearance, any works that may be required by
                statute and incidental expenses.

        8.3     Such insurance shall be against:

                (a)     loss or damage by fire, accidental explosion, storm,
                        lightning, subsidence, tempest, flood, burst pipes and
                        tanks, impact and (in peacetime) aircraft and articles
                        dropped therefrom, and such other risks insurance
                        against which the Landlord may from time to time
                        reasonably deem necessary;

                (b)     the liability of the Landlord arising out of or in
                        connection with any matter involving or relating to the
                        Building;

                (c)     the loss of Rent and Service Charge payable under this
                        Lease from time to time (having regard to any review of
                        rent which may become due under this Lease) for three
                        years or such longer period as the Landlord may from
                        time to time reasonably consider to be sufficient for
                        the purposes of planning and carrying out rebuilding or
                        reinstatement; and

                (d)     (if available) any reduction in the amount of
                        compensation payable to the Landlord with respect to
                        repair or reinstatement of the Building following any
                        successful claim under the Criminal Damage
                        (Compensation) (Northern Ireland) Order 1977 due to
                        betterment.

        8.4     The Tenant shall pay the Insurance Rent on the date hereof for
                the period from and including the commencement date of the Term
                to the day before the next policy renewal date and thereafter
                the Tenant shall pay the Insurance Rent on demand and (if
                demanded) in advance of the policy renewal date.

        8.5     If and whenever during the Term:

                (a)     the Premises or any part of them or access to them are
                        destroyed or damaged by an Insured Risk so that the
                        Premises or any part of them are unfit for occupation or
                        use; and

                                      -24-
<PAGE>   26

                (b)     except to the extent that the insurance of the Premises
                        has been vitiated by the act, neglect, default or
                        omission of the Tenant or its sub-tenants or anyone at
                        the Premises expressly or by implication with its or
                        their authority;

                the Rent and the Service Charge or a fair proportion of the Rent
                and the Service Charge according to the nature and the extent of
                the damage sustained (the amount of such proportion to be
                reasonably determined by the Surveyor) shall be suspended and
                cease to be payable until the Premises, the damaged part, or the
                access shall have been reinstated so that the Premises or the
                damaged part are made fit for occupation or use or until the
                expiration of three years from the destruction or damage
                whichever is the shorter.

        8.6     If and whenever during the Term:

                (a)     the Premises and/or the Building are damaged or
                        destroyed by an Insured Risk; and

                (b)     except to the extent that the payment of the insurance
                        monies is refused by reason of any act or default of the
                        Tenant or anyone at or near the Premises expressly or by
                        implication with the Tenant's authority;

                the Landlord will subject to clause 8.7 with all convenient
                speed take such steps as may be requisite and proper to obtain
                any planning permissions or other permits and consents that may
                be required under the Planning Acts or other Statute for the
                time being in force to enable the Landlord to rebuild and
                reinstate the Premises and/or the Building, and will as soon as
                these have been obtained spend and lay out all monies received
                in respect of such insurance (except sums in respect of loss of
                rent) in rebuilding or reinstating the Premises and/or the
                Building so destroyed or damaged making good any deficiency in
                such insurance monies out of the Landlord's own monies (save to
                the extent that such deficiency arises from the act neglect or
                default of the Tenant or its sub-tenants (if any) or anyone at
                or near the Premises with its or their authority) provided that
                the Landlord shall not be liable to rebuild or reinstate the
                Premises if the Landlord is unable (having used all reasonable
                endeavours) to obtain all planning permissions, permits and
                consents necessary to execute such rebuilding and reinstating,
                or if this Lease shall be frustrated (or if the rebuilding or
                reinstating is prevented for any other reason beyond the

                                      -25-
<PAGE>   27

                control of the Landlord) in which event the Landlord shall be
                entitled to retain all the insurance monies received by the
                Landlord.

        8.7     If after three years from the date of damage or destruction of
                the Premises and/or the Building by an Insured Risk or by any
                event giving rise to a claim under the Criminal Damage
                (Compensation) (Northern Ireland) Order 1977 the Premises and/or
                the Building remain completely unfit for occupation and use, the
                Landlord or the Tenant may by not less than three month's notice
                given to expire at any time prior to the Premises and/or the
                Building being reinstated or repaired and made fit for
                occupation and use determine this Lease ('the Determination
                Notice') and upon the expiry of the Determination Notice this
                Lease shall determine without prejudice to any rights or
                remedies which may then have accrued to either party against the
                other in respect of any breach of any of the covenants and
                conditions contained in this Lease and the Landlord shall be
                entitled to retain the insurance moneys received by the
                Landlord.

        8.8     The Tenant COVENANTS with the Landlord:

                        (a)     to comply with all the reasonable and/or normal
                                requirements and recommendations of the
                                insurers;

                        (b)     not to do or omit anything that could cause any
                                policy of insurance on the Premises to become
                                void or voidable wholly or in part nor (unless
                                the Tenant shall have previously notified the
                                Landlord and have agreed to pay the increased
                                premium) anything whereby additional insurance
                                premiums may become payable;

                        (c)     to keep the Premises supplied with such fire
                                fighting equipment as the insurers and the fire
                                authority may require and to maintain the same
                                to their satisfaction;

                        (d)     not to store or bring onto the Premises any
                                article, substance or liquid of a specially
                                combustible, inflammable or explosive nature and
                                to comply with the requirements and
                                recommendations of the fire authority (and the
                                reasonable requirements of the Landlord) as to
                                fire precautions relating to the Premises;

                        (e)     not to obstruct the access to any fire equipment
                                or the means of escape from the Premises;

                                      -26-
<PAGE>   28

                (f)     to give notice to the Landlord forthwith upon the
                        happening of any event which might affect any insurance
                        policy relating to the Premises;

                (g)     if and whenever during the Term the Premises or any part
                        thereof are damaged or destroyed by an Insured Risk, and
                        the insurance money under the policy of insurance is by
                        reason of any act or default of the Tenant or its
                        sub-tenants or anyone at the Premises expressly or by
                        implication with its or their Tenant's authority wholly
                        or partially irrecoverable, forthwith in every such case
                        to pay to the Landlord on demand with Interest the
                        amount of such insurance money so irrecoverable in which
                        event the provisions of clauses 8.5 and 8.6 shall apply;

                (h)     forthwith to inform the Landlord in writing of any
                        conviction judgment or finding of any court or tribunal
                        relating to the Tenant (or any director other officer or
                        major shareholder of the Tenant) of such a nature as to
                        be likely to affect the decision of any insurer or
                        underwriter to grant or to continue insurance of any of
                        the above mentioned risks; and

                (i)     if at any time the Tenant shall be entitled to the
                        benefit of any insurance on the Premises (which is not
                        affected or maintained in pursuance of any obligation
                        herein contained), to apply all monies received by
                        virtue of such insurance in making good the loss or
                        damage in respect of which the same shall have been
                        received.

        8.9     If at any time during the Term the total property of which the
                Premises are a part shall be increased or decreased on a
                permanent basis the percentage referred to in clause 1.13 shall
                be varied in the manner set out in clause 7.7.

9.      The Guarantor COVENANTS with the Landlord:

        9.1     If at any time during the Term the Tenant shall make any default
                in payment of the rents or in observing or performing any of the
                material covenants, conditions or other terms of this Lease the
                Guarantor will pay the rents and observe or perform the
                covenants, conditions or terms in respect of which the Tenant
                shall be in default notwithstanding:

                                      -27-
<PAGE>   29

                (a)     any time or indulgence granted by the Landlord to the
                        Tenant, or any neglect or forbearance of the Landlord in
                        enforcing the payment of rent or the observance or
                        performance of the Tenant's covenants, or any refusal by
                        the Landlord to accept rent tendered by or on behalf of
                        the Tenant at a time when the Landlord was entitled to
                        re-enter the Premises;

                (b)     that the terms of this Lease may have been varied by
                        agreement between the parties;

                (c)     that the Tenant shall have surrendered part of the
                        Premises, in which event the liability of the Guarantor
                        hereunder shall continue in respect of the part of the
                        Premises;

                (d)     any other act or thing whereby but for this provision
                        the Guarantor would have been released.

        9.2     If at any time during the Term the Tenant (being an individual)
                shall become bankrupt or (being a company) shall enter into
                liquidation and the trustee-in-bankruptcy or liquidator shall
                disclaim this Lease, the Guarantor will if the Landlord shall by
                notice within sixty (60) days after such disclaimer so require
                take from the Landlord a lease of the Premises for the residue
                of the Term which would have remained had there been no
                disclaimer at the Rent then being paid hereunder and subject to
                the same covenants and conditions as in the Lease with the
                exception of this clause, such new lease to take effect from the
                date of the said disclaimer and in such case the Guarantor shall
                pay the costs of such new lease and execute and deliver to the
                Landlord a counterpart thereof.

10.     PROVISOES

        Re-entry

        10.1    If at any time during the Term:

                (a)     the rents (or any of them or any part thereof) shall be
                        in arrear and unpaid for 14 days after becoming payable
                        (whether formally demanded or not) or shall be unpaid
                        within 14 days of demand in the case of Service Charge
                        and Insurance Rent; or

                                      -28-
<PAGE>   30

                (b)     there shall be any breach, non-performance or
                        non-observance by the Tenant of any of the covenants and
                        conditions contained in this Lease; or

                (c)     the Tenant (being an individual) becomes bankrupt or
                        (being a company) enters into liquidation whether
                        compulsory or voluntary (save for the purpose of
                        amalgamation or reconstruction of a solvent company) or
                        has a receiver appointed of its undertaking or (in
                        either case) enters into an arrangement or composition
                        for the benefit of its creditors or suffers any distress
                        or execution to be levied on its goods;

                the Landlord may at any time thereafter (and notwithstanding the
                waiver of any previous right of re-entry) re-enter the Premises
                or any part thereof in the name of the whole and thereupon the
                Term shall absolutely cease and determine but without prejudice
                to any rights or remedies which may then have accrued to the
                Landlord against the Tenant in respect of any antecedent breach
                (including the breach in relation to which re-entry is made) of
                any of the covenants and conditions contained in this Lease.

        Covenants Relating to Adjoining Land

        10.2    Nothing contained in or implied by this Lease shall give the
                Tenant the benefit of or the right to enforce or to prevent the
                release or modification of any covenant agreement or condition
                entered into by any tenant of the Landlord in respect of any
                property not comprised in this Lease.

        Disputes with Adjoining Occupiers

        10.3    If any dispute arises between the Tenant and the lessees tenants
                or occupiers of adjoining or neighbouring property belonging to
                the Landlord as to any easement, right or privilege in
                connection with the use of the Premises and the adjoining
                property, or as to the amount of any contribution towards the
                expenses or services used in common with any other property it
                shall be decided by the Landlord or in such manner as the
                Landlord shall direct.

        Floor Area

        10.4    Save in the case of manifest error, the figure set out in clause
                1.4 shall for all purposes in relation to this Lease be taken as
                representing the

                                      -29-
<PAGE>   31

                Total Lettable Area of the Premises unless and until any
                alteration shall be carried out to the Premises with the
                Landlord's consent the effect of which is to increase or
                decrease the said area.

        Effect of Waiver

        10.5    Each of the Tenant's covenants shall remain in full force both
                at law and in equity notwithstanding that the Landlord shall
                have waived or released temporarily any such covenant, or waived
                or released temporarily or permanently revocably or irrevocably
                a similar covenant or similar covenants affecting other
                adjoining or neighbouring premises belonging to the Landlord.

        Rights Easements etc

        10.6    The operation of Section 6 of the Conveyancing and Law of
                Property Act 1881 shall be excluded from this Lease and the only
                rights granted to the Tenant are those expressly set out in this
                Lease and the Tenant shall not by virtue of this Lease be deemed
                to have acquired, or be entitled to, and the Tenant shall not
                during the Term acquire or become entitled by any means
                whatsoever to, any right or easement from or over or affecting
                any other land or premises now or at any time hereafter
                belonging to the Landlord and not comprised in this Lease.

        Party Walls

        10.7    The internal division walls that divide the Premises from the
                adjoining units in the Building shall be deemed to be party
                walls and shall be maintained at the equally shared expense of
                the Tenant and the other respective estate owners.

        Exclusion of Use Warranty

        10.8    Nothing in this Lease or in any consent granted by the Landlord
                under this Lease shall imply or warrant that the Premises may be
                used for the purpose herein authorised (or any purpose
                subsequently authorised) under the Planning Acts.

        Accidents

        10.9    The Landlord shall not be responsible to the Tenant or its
                sub-tenants or to anyone at the Premises expressly or by
                implication with its or

                                      -30-

<PAGE>   32
                their authority for any accident happening or injury suffered or
                for any damage to or loss of any chattel sustained in the
                Premises or the Building save and to the extent of the
                Landlord's insurance cover therefor.

        Entire Understanding

        10.10   This Lease embodies the entire understanding of the parties
                relating to the Premises or to any of the matters dealt with by
                any of the provisions of this Lease save for pre-lease
                enquiries.

        Representations

        10.11   The Tenant acknowledges that this Lease has not been entered
                into in reliance wholly or partly on any statement or
                representation made by or on behalf of the Landlord except any
                such statement or representation that is expressly set out in
                this Lease save for pre-lease enquiries.

        Licences etc Under Hand

        10.12   Whilst the Landlord is a limited company or other corporation,
                all licences, consents, approvals and notices required or
                permitted to be given by the Landlord shall be sufficiently
                given if given under the hand of a Director, the Secretary or
                other duly authorised officer of the Landlord (or the Surveyor
                on behalf of the Landlord).

        Tenant's Property

        10.13   If after the Tenant has vacated the Premises on the expiry of
                the Term any property of the Tenant remains in or on the
                Premises, and the Tenant fails to remove it within seven days
                after being requested in writing by the Landlord so to do, or if
                after using reasonable endeavours the Landlord is unable to make
                such a request to the Tenant within fourteen days from the first
                attempt so made by the Landlord:

                (a)     the Landlord may as the agent of the Tenant sell such
                        property, provided that the Tenant will indemnify the
                        Landlord against any liability incurred by it to any
                        third party whose property shall have been sold by the
                        Landlord in the bona fide mistaken belief (which shall
                        be presumed unless the contrary be proved) that such
                        property belonged to the Tenant;

                                      -31-
<PAGE>   33

                (b)     if the Landlord having made reasonable efforts is unable
                        to locate the Tenant the Landlord shall be entitled to
                        retain the said proceeds of sale absolutely unless the
                        Tenant shall claim the same within six months of the
                        date upon which the Tenant vacated the Premises; and

                (c)     the Tenant shall indemnify the Landlord against any
                        damage occasioned to the Premises or the Building or any
                        adjacent or neighbouring premises of the Landlord and
                        any actions, claims, proceedings, costs, expenses and
                        demands made against the Landlord caused by or related
                        to the presence of the property in or on the Premises.

        Service of Notices

        10.14   The provisions of Section 67 of the Conveyancing and Law of
                Property Act 1881 as amended by the Recorded Delivery Service
                Act (Northern Ireland) 1963 shall apply to the giving and
                service of all notices and documents under or in connection with
                this Lease except that Section 67 shall be deemed to be amended
                as follows:

                In Section 67(4) the words "and that service shall be deemed to
                be made at the time at which the registered letter would in the
                ordinary course be delivered" shall be deleted and there shall
                be substituted the words "and that service shall be deemed to be
                made on the third Working Day after the registered letter has
                been posted, "Working Day" meaning any day from Monday to Friday
                (inclusive) other than Christmas Day, Good Friday and any
                statutory bank holiday".

        Tenant's Option to Determine

        10.15   Subject to the Tenant having paid the rents and all other sums
                due to the Landlord under this Lease as at the seventh
                anniversary of the commencement date of the Term the Tenant
                shall have the option to determine this Lease on the seventh
                anniversary of the commencement date of the Term on giving
                either at least twelve months prior written notice to the
                Landlord or at least six months prior written notice to the
                Landlord (time to be of the essence) and on the said seventh
                anniversary of the commencement date of the Term this Lease
                shall absolutely cease and determine without prejudice to any
                rights or remedies which may then have accrued to either party
                against the other in respect of any breach of covenant or other
                term of this Lease

                                      -32-
<PAGE>   34

                PROVIDED THAT in the event that the Tenant gives to the Landlord
                at least six months prior written notice but less than twelve
                months prior written notice the Tenant shall on the seventh
                anniversary of the commencement date of the Term pay to the
                Landlord a sum equal to 6 months Rent then payable together with
                Value Added Tax thereon.

        THE PARTIES HERETO HEREBY CERTIFY that there is no Agreement for Lease
        to which this Lease gives effect.

        IN WITNESS whereof this Lease has been executed by the parties hereto
        the day and year first herein written.

                                      -33-
<PAGE>   35

                                 FIRST SCHEDULE

                                  The Premises

`the Premises' mean all that part of the Building referred to in clause 1.3 for
the purposes of identification only shown edged red on the Plan including:

(a)     the paint, paper and other decorative finishes applied to the interior
        of the exterior walls of the Building but not any other part of the
        exterior walls;

(b)     the floor finishes so that the lower limit of the Premises includes such
        finishes but does not extend to anything below them;

(c)     the ceiling finishes so that the upper limit of the Premises shall
        include such finishes but shall not extend to anything above them;

(d)     the entirety of any non loadbearing internal walls within the Premises;

(e)     the inner half severed medially of the internal non loadbearing walls
        dividing the Premises from other parts of the Building;

(f)     all additions and improvements to the Premises;

(g)     all the Landlord's fixtures and fittings and fixtures of every kind
        which shall from time to time be in or upon the Premises whether
        originally affixed or fastened to or upon the same or otherwise except
        any such fixture installed by the Tenant and that can be removed from
        the Premises without defacing the same; and

(h)     any Pipes that exclusively serve the Premises.

                                       34
<PAGE>   36

                                SECOND SCHEDULE

                                 Rights Granted

1.      Common Parts

        The right for the Tenant and all persons expressly or by implication
        authorised by it (in common with the Landlord and all other persons
        having a like right) to use the Common Parts for all proper purposes in
        connection with the use and enjoyment of the Premises.

2.      Toilets

        The right for the Tenant as aforesaid (in common with the Landlord and
        all other persons having a like right) to use such toilets in the
        Building as shall be reasonably designated from time to time by the
        Landlord.

3.      Pipes

        The free passage and running (subject to temporary interruption for
        repair alteration or replacement) of water, soil, gas, electricity and
        other supplies to and from the Premises in and through the Pipes that
        now or hereafter serve the Premises presently or hereafter laid in on
        through or under other parts of the Building, and (if any) the Adjoining
        Property.

4.      Support

        The right of support and protection for the benefit of the Premises as
        is now enjoyed from all other parts of the Building.

5.      Car Park Spaces

        The right to use two car park spaces as designated from time to time by
        the Landlord or the Surveyor in the car park of the Building.

6.      Rear Gantry

        The right to place air conditioning and other equipment on the gantry
        area shown edged green on the map annexed hereto (the specifications and
        positioning of such equipment requiring the prior written approval of
        the Landlord such approval not to be unreasonably withheld or delayed).

                                       35
<PAGE>   37

                                 THIRD SCHEDULE

                                Rights Reserved

1.      Pipes

        The free and uninterrupted passage and running of water, soil, gas,
        electricity, telephone and other services or supply from and to other
        parts of the Building or any Adjoining Property in and through the Pipes
        which now are or may hereafter during the Term be in upon through under
        or over the Premises.

2.      Construct Easements

        The right to construct and to maintain in upon through under or over the
        Premises at any time during the Term any easements or services for the
        benefit of any part of the Building or any Adjoining Property.

3.1     Access

        The right at any time during the Term (at reasonable times and upon
        reasonable notice except in cases of emergency) to enter (or in cases of
        emergency to break and enter) the Premises to:

        (a)     inspect, cleanse, connect, lay, repair, remove, relay, replace
                with others alter or execute any works whatever to or in
                connection with, the Pipes, easements or services referred to in
                paragraphs 1 and 2 of this Schedule;

        (b)     view the state and condition of and repair and maintain the
                Building (and if any the Other Buildings) where such viewing or
                work would not otherwise be reasonably practicable;

        (c)     carry out work or do anything whatsoever comprised within the
                Landlord's obligations in this Lease whether or not the Tenant
                is liable to make a contribution;

        (d)     take schedules or inventories of fixtures and other items to be
                yielded-up on the expiry of the Term; and

        (e)     exercise any of the rights granted to the Landlord by this
                Lease.

                                       36
<PAGE>   38

3.2     The right with the Surveyor or any other surveyor acting for Landlord
        and any person acting as the Arbitrator under the Fourth Schedule at
        convenient hours and on reasonable prior notice to enter and to inspect
        and measure the Premises for all purposes connected with any pending or
        intended step under the 1996 Order or the implementation of the
        provisions of the Fourth Schedule.

4.      Scaffolding

        The right to erect scaffolding for the purpose of altering repairing
        maintaining or cleaning the Building (and (if any) the Other Buildings)
        and any buildings now or hereafter during the Term on the Adjoining
        Property notwithstanding that such scaffolding may temporarily restrict
        the access to or enjoyment and use of the Premises.

5.      Support etc

        The rights of light, air, support, shelter and all other easements and
        rights now or hereafter belonging to or enjoyed by other parts of the
        Building.

6.      Light

        Full right and liberty at any time hereafter:

        (a)     to alter raise the height of or re-build the Building or any
                part thereof or any of the Other Buildings;

        (b)     to erect the Other Buildings of any height; or

        (c)     to erect install or alter any structure erections fixtures
                fittings or equipment in on or to the Building or any part
                thereof or any of the other Buildings;

        in such manner as the Landlord shall think fit notwithstanding the fact
        that the same may obstruct, affect or interfere with the amenity of or
        access to the Premises, or the passage of light and air to the Premises
        Provided Always that there is provided at all times (save for any
        necessary temporary introduction thereto) adequate means of access to
        the Premises.

                                       37
<PAGE>   39

                                 FOURTH SCHEDULE

                                   Rent Review

1.1     The terms defined in this paragraph shall for all purposes of this
        Schedule have the meanings specified.

1.2     `Review Period' means the period between the Review Date and the expiry
        of the Term.

1.3     `the Assumptions' mean the following assumptions at the relevant Review
        Date:

        (a)     that the Premises are fit for and fitted out and equipped for
                immediate occupation and use (but disregarding the fit-out works
                themselves), and that no work has been carried out on the
                Premises by the Tenant its sub-tenants or their predecessors in
                title during the Term which has diminished the rental value of
                the Premises, and if the Premises have been destroyed or damaged
                they have been fully restored;

        (b)     that the Premises are available to let by a willing landlord to
                a willing tenant as a whole, without a premium, but with vacant
                possession, and subject to the provisions of this Lease (other
                than the amount of the Rent but including the provisions for
                rent review), for a term equal to the Term, and that the said
                letting would be renewed at the expiry of the term thereof under
                the provisions of the 1996 Order;

        (c)     that the covenants contained in this Lease on the part of the
                Landlord and the Tenant have been fully performed and observed;

        (d)     that the Tenant and tenants in the market generally are
                registered for Value Added Tax ("VAT") and will be able to set
                off in full by way of input tax any VAT payable in respect of
                any payment of rents against the output tax payable by them; and

        (e)     in case the Premises or the access thereto or any other part of
                the Building have been destroyed or damaged that they have been
                fully reinstated.

                                       38
<PAGE>   40

1.4     'the Disregarded Matters' mean:

        (a)     any effect on rent arising from the fact that the Tenant, its
                sub-tenants or their respective predecessors in title have been
                in occupation of the Premises;

        (b)     any goodwill attached to the Premises by reason of the carrying
                on at the Premises of the business of the Tenant its
                sub-tenants, or their predecessors in title in their respective
                businesses;

        (c)     any increase in rental value of the Premises attributable to the
                existence at the Review Date of any improvement to the Premises
                and carried out with consent where required otherwise than in
                pursuance of an obligation to the Landlord or its predecessors
                in title either:

                (i)     by the Tenant, its sub-tenants, or their respective
                        predecessors in title during the Term, or during any
                        period of occupation prior thereto arising out of an
                        agreement to grant such term; or

                (ii)    by any tenant or sub-tenant of the Premises before the
                        commencement of the Term, so long as the Landlord or its
                        predecessors in title have not since the improvement was
                        carried out had vacant possession of the relevant part
                        of the Premises.

        (d)     any obligation on the part of the Tenant to reinstate the
                Premises at the end or sooner determination of the Term or at
                any other time in pursuance of any obligation to the Landlord
                whether under this Lease or any other deed or document executed
                after the date of this Lease.

        (e)     any discount or rebate of the market rent to allow for any
                customary concessionary rent, rent free period or other
                inducement which a willing landlord would customarily grant to a
                willing tenant upon such a letting for tenant's fit-out works.

        (f)     all fit-out works carried out by occupiers of the Premises.

1.5     'the Arbitrator' means a person appointed by agreement between the
        parties, or in default of agreement within fourteen days of one party
        giving notice to the other of its nomination or nominations nominated by
        the Chairman on the

                                       39
<PAGE>   41

        application either party made not earlier than six months before the
        relevant Review Date or at any time thereafter.

1.6     'the Chairman' means the Chairman for the time being of the Northern
        Ireland branch of the Royal Institution of Chartered Surveyors, the duly
        appointed deputy of the Chairman, or any person authorised by the
        Chairman to make appointments on his behalf.

2.      The Rent shall be:

        (a)     until the Review Date the Initial Rent, and

        (b)     during the Review Period, a rent equal to the Rent previously
                payable under this Lease immediately prior to the Review Date or
                such revised rent as may be ascertained in accordance with this
                Schedule whichever shall be the greater.

3.      Such revised rent for the Review Period may be agreed in writing at any
        time between the parties or (in the absence of agreement) determined
        (not earlier than the relevant Review Date) by the Arbitrator.

4.      The revised rent to be determined by the Arbitrator shall be such as he
        shall decide should be the rent at which the Premises might reasonably
        be expected to be let on the open market after the expiry of a rent free
        period of such length as would be negotiated in the open market between
        a willing landlord and a willing tenant at the relevant Review Date for
        the Premises making the Assumptions but disregarding the Disregarded
        Matters and having regard to open market rental values current at the
        Review Date.

5.      The arbitration shall be conducted in accordance with the Arbitration
        Act 1996.

6.      When the Rent shall have been ascertained in accordance with this
        Schedule, memoranda thereof shall be signed by or on behalf of the
        parties and annexed to this Lease and its counterpart and the parties
        shall bear their own costs in respect of this.

7.      If the revised rent payable on and from any Review Date has not been
        ascertained by that Review Date, Rent shall continue to be payable at
        the rate previously payable (such payments being on account of the Rent
        for that Review Period), and forthwith upon the revised rent being
        ascertained (that is to say the date when the same has been agreed
        between the parties or the date of the Arbitrator's award), the Tenant
        shall pay to the Landlord any shortfall between what would have been
        paid on the Review Date and on any subsequent rent

                                       40

<PAGE>   42
        days, had the revised rent been determined, and the payment made by the
        Tenant on account together with Interest (interest at the Base Rate of
        the Bank referred to in or nominated pursuant to clause 1.9 prevailing
        on the day upon which the shortfall is paid) on each instalment of Rent
        due on or after the Review Date on the difference between what would
        have been paid on that rent day, had the revised rent been determined,
        and the amount paid on account the interest being payable for the period
        from that date upon which the instalment was due up to the date of
        payment of the shortfall.

8.      If at any of the Review Dates there shall be in force a statute which
        shall prevent restrict or modify the Landlord's right to review the Rent
        in accordance with this Lease and/or to recover any increase in the
        Rent, the Landlord shall when such restriction or modification is
        removed, relaxed or modified be entitled (but without prejudice to its
        rights - if any - to recover any rent the payment of which has only been
        deferred by law) on giving not less than one month's notice in writing
        to the Tenant (at any time within 6 months (time being of the essence in
        this regard) of the restriction or modification being removed relaxed or
        modified) to proceed with any review of the Rent which may have been
        prevented or further to review the Rent in respect of any review where
        the Landlord's right was restricted or modified and the date specified
        in the said notice shall be deemed for the purposes hereof to be a
        Review Date (providing that nothing herein shall be construed as
        varying any subsequent Review Dates except any Review Dates where such a
        statute shall be in force in which event the provisions of this
        paragraph shall apply) and the Landlord shall be entitled to recover any
        resulting increase in Rent with effect from the earliest date as shall
        be permitted by law.

                                       41
<PAGE>   43

                                 FIFTH SCHEDULE

                              The Office Covenants

1.      Repair etc and Decoration

        1.1     Not to cut injure alter or remove any of the Building.

        1.2     In every Decorating Year and in the last year of the Term to
                redecorate the Premises in good and workmanlike manner and with
                appropriate materials of good quality (to the reasonable
                satisfaction of the Surveyor) all tints colours and patterns to
                be approved by or on behalf of the Landlord in writing (such
                approval not to be unreasonably withheld or delayed).

        1.3     To clean the inside of all windows (and the inside of all window
                frames) in the Premises at least once in every month.

        1.4     To employ for the cleaning of the Premises only such firm or
                company as shall be approved by the Landlord (such approval not
                to be unreasonably withheld or delayed).

2.      User

        2.1     Not to use the Premises for any purpose other than as offices
                within Classes 2 or 3 of the Schedule to the Planning (Use
                Classes) Order (Northern Ireland) 1989 and/or for the use of a
                software company.

        2.2     Not to play or use any musical instrument loudspeaker tap
                recorder gramophone radio or other equipment or apparatus that
                produces sound in the Premises so as to be heard in nearby
                premises or outside the Premises.

        2.3     Not to cease to carry on business in the Premises or have them
                vacant for longer than 14 days without:

                (a)     notifying the Landlord; and

                (b)     providing such caretaking or security arrangements as
                        the Landlord shall reasonably require in order to
                        protect the Premises from vandalism theft damage or
                        unlawful occupation.

                                       42
<PAGE>   44

3.      Aerials, Signs and Advertisements

        3.1     Not without the prior written consent of the Landlord (such
                consent not to be unreasonably withheld or delayed) to erect any
                pole mast or wire (whether in connection with telegraphic,
                telephonic, radio or television communication or otherwise) upon
                any part of the outside of the Building.

        3.2     Not to affix or to exhibit on the outside of the Building or to
                or through any window of the Premises or Building any placard
                sign notice fascia board or advertisement except the approved
                sign referred to in paragraph 3.3 of this Schedule.

        3.3     At all times to display and maintain a suitable sign showing the
                Tenant's trading name and business of a size and kind first
                approved by the Surveyor (such approval not to be unreasonably
                withheld or delayed) and at a point with the Building to be
                reasonably specified in writing by him.

4.      Common Parts

        4.1     Not to cause the Common Parts (or any other land roads or
                pavements adjoining on the Premises) to become untidy or in a
                dirty condition but at all times to keep the Common Parts and
                other land, roads or pavements free from deposits of materials
                and refuse.

        4.2     Not to place deposit or expose outside any part of the Premises
                any goods materials articles or things whatsoever for display or
                sale or for any other purpose nor cause any obstruction of the
                Common Parts.

5.      Pollution

        Not to permit to be discharged into the Pipes any oil or grease, or any
        deleterious, objectionable, dangerous, poisonous or explosive matter or
        substance, and to take all reasonable measures to ensure that effluent
        discharged into the Pipes will not be corrosive or otherwise harmful to
        the Pipes or cause obstruction to them.

6.      Roof and Floor Weighting

        6.1     Not without the consent in writing of the Landlord to:

                                       43
<PAGE>   45

                (a)     suspend any undue weight from the walls or ceilings of
                        the Building or use the same for the storage of goods or
                        place any undue weight on them; or

                (b)     have on the Premises any safes, machinery, goods or
                        other articles which may unduly strain or damage the
                        Premises.

        6.2     On any application by the Tenant for the Landlord's consent
                under paragraph 6.1, the Landlord shall be entitled to consult
                and obtain the advice of an engineer or other person in relation
                to the roof or floor loading proposed by the Tenant and the
                Tenant shall repay to the Landlord on demand the fees of such
                engineer or other person.

7.      Machinery

        7.1     Not to install or use in or upon the Premises any machinery or
                apparatus which will cause noise or vibration which can be heard
                or felt in nearby premises or outside the Premises or which may
                cause structural damage.

        7.2     To keep all machinery and equipment upon the Premises properly
                maintained and in good working order, and for that purpose to
                employ reputable contractors for the regular periodic inspection
                and maintenance of them, to renew all working and other parts as
                and when necessary or when recommended by such contractors, to
                ensure by directions to the Tenant's staff and otherwise that
                such plant, apparatus and machinery is properly operated, and to
                avoid damage to the Premises by vibration or otherwise.

8.      Unloading and Parking

                Not to load or unload any goods or materials onto or from
                vehicles and convey the same into the Building and the Premises
                except through the entrances designated as service entrances
                from time to time by the Landlord or the Surveyor (and by means
                of any lift designated for such purposes).

9.      Heating and Cooling Ventilation

        9.1     Not to do anything which interferes with the heating cooling or
                ventilation of the Common Parts or which imposes an additional
                load on the heating cooling or ventilation plant and equipment.

                                       44
<PAGE>   46

        9.2     During the Permitted Hours to operate the ventilation equipment
                in the Premises which comprises part of the system for the air
                conditioning of the Common Parts in accordance with the
                regulations for such purpose made by the Landlord from time to
                time.

10.     Regulations

                To comply with all reasonable regulations made by the Landlord
                from time to time for the management of the Building provided
                that in the event of conflict between such regulations and the
                terms of this Lease then the terms of this Lease shall apply.

                                       45
<PAGE>   47

                                 SIXTH SCHEDULE

                                  The Services

        Maintaining etc Retained Parts

1.      Maintaining, repairing, (and where beyond economic repair or necessary
        to comply with statutory requirements) renewing and replacing and, where
        appropriate, painting and decorating (to such standard as the Landlord
        may reasonably from time to time consider adequate) the Retained Parts.

        Lift

2.      Providing a lift service during the Permitted Hours by the operation of
        the lifts now installed in the Building or (where the existing lifts are
        beyond economic repair or necessary to comply with statutory
        requirements) by such substituted lifts as the Landlord may from time to
        time decide to install.

3.      Hot and Cold Water

        Maintaining during the Permitted Hours an adequate supply of hot and
        cold water and supplying necessary washing and toilet requisites in the
        toilet accommodation situate in the Retained Parts.

4.      Central Heating

        Supplying during the Permitted Hours central heating to the Premises and
        the Common Parts.

5.      Maintaining etc Apparatus, Plant, Machinery etc

        Inspecting, servicing, maintaining, repairing, amending, overhauling,
        (and where beyond economic repair or necessary to comply with statutory
        requirements renewing and replacing, and insuring (save in so far as
        insured under other provisions of this Lease) all apparatus, plant,
        machinery and equipment within the Retained Parts from time to time
        including (without prejudice to the generality of the foregoing) lifts,
        lift shafts, stand-by generators and boilers and items relating to
        mechanical ventilation, heating, cooling, public address, closed circuit
        television (if any).

                                       46
<PAGE>   48

6.      Maintaining etc Pipes

        Maintaining, repairing, cleansing, emptying, draining, amending and
        renewing all Pipes in or serving the Building except those that are
        within and solely serve the Premises or any part of the Building that is
        let or intended for letting.

7.      Maintaining etc Fire Alarms etc

        Maintaining, repairing, replacing and renewing any fire alarms and
        ancillary apparatus, fire prevention and fire fighting equipment, and
        other apparatus in the Retained Parts.

8.      Cleaning etc Retained Parts

        Cleaning, treating, polishing, heating, ventilating and lighting the
        Retained Parts to such standard as the Landlord may from time to time
        consider adequate.

9.      Fixtures Fittings etc

        Supplying, providing, purchasing, hiring, maintaining, renewing,
        replacing, repairing, servicing, overhauling and keeping in good and
        serviceable order and condition all appurtenances, fixtures, fittings,
        bins, receptacles, tools, appliances, materials, equipment and other
        things which the Landlord may deem desirable or necessary for the
        maintenance, appearance, upkeep or cleanliness of the Building or any
        part of it.

10.     Windows

        Cleaning as frequently as the Landlord shall in its reasonable
        discretion consider adequate the exterior of all windows in the Building
        and interior and exterior of all windows and window frames in the
        Retained Parts.

11.     Refuse

        Collecting and disposing of refuse from the Building and the provision,
        repair, maintenance, and renewal of plant and equipment for the
        collection, treatment, packaging, or disposal of refuse.

12.     Additional

        Such other services relating to the Building as the Landlord shall from
        time to time reasonably deem necessary or desirable and not expressly
        mentioned herein.

                                       47
<PAGE>   49

        Provided Always that all services shall be provided by the Landlord in
        accordance with the principles of good estate management.

                                       48
<PAGE>   50

                                SEVENTH SCHEDULE

                         Additional items of Expenditure

1.1     Fee

        The reasonable fees and disbursements (and any VAT payable thereon) of:

        (a)     the Surveyor and any other individual firm or company employed
                or retained by the Landlord for (or in connection with) such
                surveying or accounting functions, or the management of the
                Building;,

        (b)     the managing agents whether or not the Surveyor for (or in
                connection with):

                (i)     the management of the Building;

                (ii)    the collection of the rents and all other sums due to
                        the Landlord from the tenants of the Building;

                (iii)   the performance of the Services and any other duties in
                        and about the Building or any part of it relating to
                        (without prejudice to the generality of the foregoing)
                        the general management, administration, security,
                        maintenance, protection, cleanliness of the Building;

        (c)     any other individual firm or company employed or retained by the
                Landlord to perform (or in connection with) any of the Services
                or any of the functions or duties referred to in this paragraph.

1.2     The reasonable fees of the Landlord or a Group Company for any of the
        Services or the other functions and duties referred to in paragraph 1.1
        above that shall be undertaken by the Landlord or a Group Company and
        not by a third Party.

2.      Staff etc

        The reasonable cost of employing (whether by the Landlord, a Group
        Company, the managing agents or any other individual firm or company)
        such staff as the Landlord may reasonably deem necessary for the
        performance of the Services and the other functions and duties referred
        to in paragraph 1.1 above and all other incidental expenditure in
        relation to such employment or the termination thereof.

                                       49
<PAGE>   51

3.      Outgoings

        All existing and future rates, water rates, charges, duties,
        assessments, impositions and other outgoings payable by the Landlord in
        respect of the Building or any part of it (excluding the Premises and
        any other part of the Building that is let or intended for letting)
        including (but without prejudice to the generality of the foregoing)
        residential accommodation for caretakers engineers and other staff
        employed in connection with the Building.

4.      Electricity and Gas etc

        The cost of the supply of electricity gas oil or other fuel for the
        provision of the Services and for all purposes in connection with the
        Retained Parts.

S.      Road etc Charges

        The amount which the Landlord shall be called upon to pay as a
        contribution towards the expense of making, repairing, maintaining,
        rebuilding and cleansing any ways roads pavements or structures Pipes
        party fences walls or anything which may belong to or be used for the
        Building or any part of it exclusively or in common with other premises
        near or adjoining the Building.

6.      Regulations

        The costs charges and expenses of preparing and supplying to the tenants
        copies of any Regulations made by the Landlord relating to the Building
        or the use of it.

7.      Statutory etc Requirements

        The cost of taking all steps deemed desirable or expedient by the
        Landlord for complying with, making representations against, or
        otherwise contesting the incidence of the provisions of any regulation,
        byelaw notice, legislation, order or statutory requirements concerning
        town planning, public health, highways, streets, drainage or other
        matters relating or alleged to relate to the Building or any part of it
        for which any tenant is not directly liable.

8.      Nuisance

        The cost to the Landlord of abating a nuisance in respect of the
        Building or any part of it in so far as the same is not the liability of
        any individual tenant.

9.      Anticipated Expenditure

                                       50

<PAGE>   52

Such provision (if any) for anticipated expenditure in respect of any of the
Services or the above mentioned matters as the Landlord shall in its reasonable
discretion consider appropriate.

SEALED with the COMMON SEAL
of DERAMORE HOLDINGS LIMITED
in the presence of:-

SEALED with the COMMON SEAL of
PIVOTAL CORPORATION (NI) LIMITED
in the presence of:-

SEALED with the COMMON SEAL of
PIVOTAL CORPORATION
in the presence of:-

                                      -51-

<PAGE>   53

We, THE GOVERNOR AND COMPANY OF THE BANK OF IRELAND, as Mortgagee hereby consent
to the within Lease.

Dated     day of              2000

-----------------------------------
Authorised Signatory

                                       52
<PAGE>   54

                         [DERAMORE PROPERTY GROUP LOGO]

14th April 2000

Pivotal Corporation Limited,
Hamilton House,
111 Marlowes,
Hemel Hempstead,
Hertfordshire.
HP1 1BD.

Dear Sirs,

THIRD FLOOR CAPITAL HOUSE, 3 UPPER QUEEN STREET, BELFAST

In consideration of you agreeing to take a lease of the above premises on the
agreed terms, we confirm that we shall permit you to take occupation of the
whole of the premises at 9 am on 17 April 2000 and we shall grant to you a lease
in the form annexed hereto and shall complete the same within 28 days.

We further agree as follows:

1. We shall, at our own expense, install a 24-hour card access system at the
   main door of the building to a specification notified to you. The system
   shall be installed within 21 days of you taking occupation of the premises
   and the cost of installation shall be added to the Service Charge.

2. As regards the Service Charge, we confirm as follows:

   2.1 No major capital expenditure is currently planned for the building.

   2.2 During the term of the Lease we shall give you reasonable prior notice of
       any individual item of capital expenditure under the Service Charge which
       is likely to exceed (pound) 100,000.00 and shall consult with you
       thereon.

   2.3 We confirm that the present Service Charge estimates are based on
       (pound)3 per square foot.

                                 41 ROYAL AVENUE
                                 BELFAST BT1 1FB
                      TEL: 028 90 244030 FAX: 028 90243652
                              Email@deramore.co.uk

<PAGE>   55

   2.4 We confirm that the cost of the presently anticipated restructuring and
       refurbishment of the ground floor area shall not be added to Service
       Charge and Service Charge shall not include any other building costs
       which arise as a result of such works.

3. We approve the drawings and specifications of your fit out, subject to same
   meeting statutory requirements.

On any future disposal of our interest in Capital House, we shall procure that
the relevant purchaser shall provide you with a side-letter incorporating points
2.1 and 2.4 (in so far as same relates to the present refurbishment programme at
the date hereof) of this letter.

Signed on behalf of
Deramore Holdings Limited

/s/ [SIGNATURE ILLEGIBLE]
--------------------------------------

We accept and confirm the foregoing conditions

Dated day of 2000

Signed on Behalf of Pivotal Corporation Limited

---------------------------------------

Signed on Behalf of Pivotal Corporation

Dated day of 2000

<PAGE>   56
                                                       Deramore Holdings Limited
                                                       160 Brompton Road
                                                       Knightsbridge
                                                       London
                                                       SW3 1RP

                                                       14 April 2000

Pivotal Corporation Limited
Hamilton House
111 Marlowes
Hemel Hempstead
Hertfordshire
HP1 1BD

BY POST & FAX

Dear Sirs

THIRD FLOOR CAPITAL HOUSE 3 UPPER QUEEN STREET BELFAST

In consideration of you agreeing to take a lease of the above premises on the
agreed terms, we confirm that we shall permit you to take occupation of the
whole of the premises at 9 am on 17 April 2000 and we shall grant to you a
lease in the form annexed hereto and shall complete the same within 28 days.

We further agree as follows:

1    We shall, at our own expense, install a 24-hour card access system at the
     main door of the building to a specification notified to you. The system
     shall be installed within 21 days of you taking occupation of the premises
     and the cost of installation shall not be added to the Service Charge.

2    As regards the Service Charge, we confirm as follows:

     2.1  No major capital expenditure is currently planned for the building.

     2.2  During the term of the Lease we shall give you reasonable prior notice
          of any individual item of capital expenditure under the Service Charge
          which is likely to exceed (pound sterling)100,000.00 and shall
          consult with you thereon.

<PAGE>   57

     2.3  We confirm that the present Service Charge estimates are based on
          (pound sterling)3 per square foot.

     2.4  We confirm that the cost of the presently anticipated restructuring
          and refurbishment of the ground floor area shall not be added to
          Service Charge and Service Charge shall not include any other
          building costs which arise as a result of such works.

3    We approve the drawings and specifications of your fit out, subject to
     same meeting statutory requirements.

     On any future disposal of our interest in Capital House, we shall procure
     that the relevant purchaser shall provide you with a side-letter
     incorporating points 2.1 and 2.4 (in so far as same relates to the present
     refurbishment programme at the date hereof) of this letter.

Signed on behalf of
Deramore Holdings Limited

We accept and confirm the foregoing conditions

Dated 14 day of April 2000

Signed on Behalf of Pivotal Corporation Limited

 /s/ VINCENT MIFSUD                 VINCENT MIFSUD
-----------------------------

/s/ VINCENT MIFSUD                  VINCENT MIFSUD

Signed on Behalf of Pivotal Corporation

Dated 14 day of April 2000

<PAGE>   58
                                  [STREET MAP]

<PAGE>   59
                               [THIRD FLOOR PLAN]<PAGE>   1
                                                                   EXHIBIT 10.28

[EQUITY OFFICE LETTERHEAD]

July 7, 1999

VIA HAND DELIVERY

Exactium, Inc.
Lakeside Building
5775-B Glenridge Drive, Suite 200
Atlanta, Georgia 30328
Attention: Jeanne B. Jambor

Re:   Office Lease Agreement dated as of December 4, 1997, by and between EOP-
      LAKESIDE OFFICE, L.L.C., a Delaware limited liability company (as
      successor by merger to Beacon Properties, L.P.), as Landlord, and
      EXACTIUM, INC., a Delaware corporation, as Tenant, relating to which
      Landlord has leased to Tenant certain premises containing approximately
      10,638 rentable square feet (the "Premises") on the 2nd floor of the
      building commonly known as Lakeside Building B located at 5775-B Glenridge
      Drive, Atlanta, Georgia 30328 (the "Building"), which lease has been
      previously amended by instruments dated May 14, 1999 (the "First
      Amendment") and June 22, 1999 (the "Second Amendment") (collectively, the
      "Lease").

Dear Ms. Jambor:

      In order to correct a clerical error, the parties to the Lease hereby
agree that Section II.D of the Second Amendment is revised by deleting Section
II.D. and replacing it with the following: "Twelve (12) equal installments of
$2,322.55 each payable on or before the first day of each month during the
period beginning February 1, 2002, and ending January 31, 2003."

      Please acknowledge your agreement to the foregoing by executing all three
(3) copies of this letter agreement and return two (2) fully executed copies of
the same to my attention.

                                      Sincerely,

                                      EOP Operating Limited Partnership, a
                                      Delaware limited partnership, as agent for
                                      Landlord

                                      By: Equity Office Properties Trust, a
                                          Maryland real estate investment trust,
                                          its managing general partner

                                          By: /s/  ANNE WOOD
                                             -----------------------------------
                                          Name: Anne Wood
                                          Title: Property Manager
<PAGE>   2
Ms. Jeanne B. Jambor
July 7, 1999
Page 2

The undersigned hereby agree to the
foregoing as of 7/7, 1999

EXACTIUM, INC., A DELAWARE CORPORATION

By: JEANNE B. JAMBOR
   --------------------------

Name: JEANNE B. JAMBOR
     ------------------------

Title: CFO
      -----------------------
<PAGE>   3
[EQUITY OFFICE LETTERHEAD]
LAKESIDE

Date: 03/16/99

Tenant: Exactium, Inc.

Address: 5775 B Glenridge Drive
         Suite - 200
         Atlanta, Georgia 30328

Re:   Commencement Letter with Respect to that certain Lease Dated DECEMBER
      4, 1997 by and between BEACON PROPERTIES, L.P. whose interest has been
      assigned to EQUITY OFFICE PROPERTIES TRUST as Landlord, and EXACTIUM,
      INC., as Tenant, for 6,968 square feet of Rentable Area on the SECOND
      floor of the Building located at 5775 B GLENRIDGE DRIVE ATLANTA, GEORGIA
      30328.

Dear Mrs. Jambor:

In Accordance with the terms and conditions of the above reference Lease, Tenant
hereby accepts possession of the Premises and agrees as follows:

      1. The Commencement Date of the Lease is JANUARY 23, 1998.

      2. The Termination Date of the Lease is JANUARY 31, 2003.

Please acknowledge your acceptance of possession and agreement to the terms set
forth above by signing all three (3) copies of this Commencement Letter in the
space provided and returning two (2) fully executed copies of the same to my
attention

Sincerely,

[ILLEGIBLE]

Property Manager

Agreed and Accepted:

      Tenant: EXACTIUM, INC.
             ---------------------
      By: /s/ JEANNE B. JAMBOR
         -------------------------
      Name: JEANNE B. JAMBOR
           -----------------------
      Title: CFO
            ----------------------
      Date: 1/16/99
           -----------------------
<PAGE>   4
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                 ACORD(TM) CERTIFICATE OF LIABILITY INSURANCE                                                        DATE (MM/DD/YY)
                                                                                                                            4/06/99
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>
PRODUCER                                                                     THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION
                                                                             ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER.
  JSL & CO. OF ATLANTA                                                       THIS CERTIFICATE DOES NOT AMEND, EXTEND, OR ALTER THE
  J. Smith Lanier & Company                                                  COVERAGE AFFORDED BY THE POLICIES BELOW.
  P.O. Box 80707                                                             -------------------------------------------------------
  Atlanta, GA 30366-0707                                                                  COMPANIES AFFORDING COVERAGE
  (770) 476-1770                                                             -------------------------------------------------------
                                                                             COMPANY
                                                                                A    Federal Insurance Co.
------------------------------------------------------------------------------------------------------------------------------------
INSURED                                                                      COMPANY
                                                                                B
  Exactium, Inc                                                              -------------------------------------------------------
  5775-B Glenridge Dr.                                                       COMPANY
  Atlanta, GA 30328                                                             C
                                                                             -------------------------------------------------------
                                                                             COMPANY
                                                                                D
------------------------------------------------------------------------------------------------------------------------------------
COVERAGES
------------------------------------------------------------------------------------------------------------------------------------
THIS IS TO CERTIFY THAT THE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED TO THE INSURED NAMED ABOVE FOR THE POLICY PERIOD
INDICATED, NOTWITHSTANDING ANY REQUIREMENT, TERM OR CONDITION OF ANY CONTRACT OR OTHER DOCUMENT WITH RESPECT TO WHICH THE
CERTIFICATE MAY BE ISSUED OR MAY PERTAIN, THE INSURANCE AFFORDED BY THE POLICIES DESCRIBED HEREIN IS SUBJECT TO ALL THE TERMS,
EXCLUSIONS AND CONDITIONS OF SUCH POLICIES. LIMITS SHOWN MAY HAVE BEEN REDUCED BY PAID CLAIMS.
------------------------------------------------------------------------------------------------------------------------------------
CO                                                        POLICY EFFECTIVE  POLICY EXPIRATION
LTR  TYPE OF INSURANCE                    POLICY NUMBER   DATE (MM/DD/YY)    DATE (MM/DD/YY)                  LIMITS
------------------------------------------------------------------------------------------------------------------------------------
 A   GENERAL LIABILITY                    35364820T16        12/30/98          12/30/99        GENERAL AGGREGATE             $2,000
                                                                                               -------------------------------------
      X    COMMERCIAL GENERAL LIABILITY                                                        PRODUCTS-COMP/OP AGG          $2,000
     ---                                                                                       -------------------------------------
           CLAIMS MADE   X  OCCUR                                                              PERSONAL & ADV INJURY         $1,000
     ---                ---                                                                    -------------------------------------
           OWNER'S & CONTRACTOR'S PROT                                                         EACH OCCURRENCE               $1,000
     ---                                                                                       -------------------------------------
                                                                                               FIRE DAMAGE (Any one fire)    $  350
     ---   ---------------------------                                                         -------------------------------------
                                                                                               MED EXP (Any one person)      $   10
------------------------------------------------------------------------------------------------------------------------------------
     AUTOMOBILE LIABILITY                                                                      COMBINED SINGLE LIMIT         $
                                                                                               -------------------------------------
           ANY AUTO                                                                            BODILY INJURY                 $
     ---                                                                                       (Per person)
           ALL OWNED AUTOS                                                                     -------------------------------------
     ---                                                                                       BODILY INJURY                 $
           SCHEDULED AUTOS                                                                     (Per accident)
     ---                                                                                       -------------------------------------
           HIRED AUTOS                                                                         PROPERTY DAMAGE
     ---                                                                                       -------------------------------------
           NON-OWNED AUTOS
     ---

     ---   ---------------------------

     ---   ---------------------------
------------------------------------------------------------------------------------------------------------------------------------
     GARAGE LIABILITY                                                                          AUTO ONLY - EA ACCIDENT       $
                                                                                               -------------------------------------
           ANY AUTO                                                                            OTHER THAN AUTO ONLY:
     ---                                                                                       -------------------------------------
                                                                                               EACH ACCIDENT                 $
     ---   ---------------------------                                                         -------------------------------------
                                                                                               AGGREGATE                     $
     ---   ---------------------------
------------------------------------------------------------------------------------------------------------------------------------
 A   EXCESS LIABILITY                     79766562ATL        12/30/98          12/30/99        EACH OCCURRENCE               $1,000
                                                                                               -------------------------------------
      X    UMBRELLA FORM                                                                       AGGREGATE                     $1,000
     ---                                                                                       -------------------------------------
           OTHER THAN UMBRELLA FORM
     ---
------------------------------------------------------------------------------------------------------------------------------------
     WORKERS COMPENSATION AND                                                                  WC STATUTORY LIMITS   OTHER
     EMPLOYERS' LIABILITY                                                                      -------------------------------------
                                                                                               EL EACH ACCIDENT              $
     THE PROPRIETOR/      [ ] INCL.                                                            -------------------------------------
     PARTNERS/EXECUTIVE   [ ] EXCL.                                                            EL DISEASE-POLICY LIMIT       $
     OFFICERS ARE:                                                                             -------------------------------------
                                                                                               EL DISEASE-EA EMPLOYEE        $
------------------------------------------------------------------------------------------------------------------------------------
OTHER

------------------------------------------------------------------------------------------------------------------------------------
DESCRIPTION OF OPERATIONS/LOCATIONS/VEHICLES/SPECIAL ITEMS              EOP-Lakeside Office, L.L.C., a Delaware limited liability
company, Equity Office Properties Trust, a Maryland real estate investment trust, EOP Operating Limited Partnership, A Delaware
limited partnership, and their respective agents, members, partners, employees and mortgagees as Additional Insureds.
------------------------------------------------------------------------------------------------------------------------------------
CERTIFICATE HOLDER                                               CANCELLATION

Lakeside Office Park                                             SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE THE
5775 B Glendride Drive Ste 500                                   EXPIRATION DATE THEREOF, THE ISSUING COMPANY WILL ENDEAVOR TO ????
Atlanta, GA 30328-1223                                           30 DAYS WRITTEN NOTICE TO THE CERTIFICATE HOLDER NAMED TO THE ????
                                                                 BUT FAILURE TO MAIL SUCH NOTICE SHALL IMPOSE NO OBLIGATION OR
                                                                 LIABILITY OF ANY KIND UPON THE COMPANY, ITS AGENTS OR
                                                                 REPRESENTATIVES.
                                                                 -------------------------------------------------------------------
                                                                 AUTHORIZED REPRESENTATIVE

                                                                 [SIGNATURE ILLEGIBLE]

------------------------------------------------------------------------------------------------------------------------------------
ACORD 25-S (1/95)                                                       (C) ACORD CORPORATION
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                CERTIFICATE: 001/001/00001
</TABLE>
<PAGE>   5
[EQUITY OFFICE LETTERHEAD]
SOUTHEAST REGION

June 24, 1999

Ms. Jeannie Jambor
Exactium, Inc.
5775-B Glenridge Drive
Suite 200
Atlanta, Georgia 30328

RE:   Second Amendment to Lease Agreement
      Lakeside Building B

Dear Jeannie:

Enclosed please find one (1) fully executed copy of the above referenced
document. This copy is for your permanent records.

Should you have any questions regarding the enclosed, please do not hesitate to
contact Kristie Abney or myself.

Sincerely,

/s/ SHERI E. WELCH

Sheri E. Welch
Leasing Assistant

Enclosures

<PAGE>   6
                                 FIRST AMENDMENT

      THIS FIRST AMENDMENT (the "Amendment") is made and entered into as of the
14 day of MAY, 1999, by and between EOP-LAKESIDE OFFICE, L.L.C., a Delaware
limited liability company ("Landlord"), and EXACTIUM, INC., a Delaware
corporation ("Tenant").

                                   WITNESSETH

A.    WHEREAS, Landlord (as successor by merger to Beacon Properties, L.P.) and
      Tenant are parties to that certain lease dated the 4th day of December,
      1997 (the "Lease"), for space currently containing approximately 6,968
      rentable square feet (the "Original Premises") described as Suite No. 200
      on the 2nd floor of the building commonly known as Lakeside Building B and
      the address of which is 5775-B Glenridge Drive, Atlanta, Georgia 30328
      (the "Building"); and

B.    WHEREAS, Tenant has requested that additional space containing
      approximately 2,332 rentable square feet described as Suite No. 250 on the
      2nd floor of the Building shown on EXHIBIT A hereto (the "Expansion
      Space") be added to the Original Premises and that the Lease be
      appropriately amended and Landlord is willing to do the same on the terms
      and conditions hereinafter set forth;

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
      herein contained and other good and valuable consideration, the receipt
      and sufficiency of which are hereby acknowledged, Landlord and Tenant
      agree as follows:

      I. EXPANSION AND EFFECTIVE DATE.

            A.    Effective as of June 1, 1999 (the "Expansion Effective Date"),
                  the Premises, as defined in the Lease, is increased from 6,968
                  rentable square feet on the 2nd floor to 9,300 rentable square
                  feet on the 2nd floor by the addition of the Expansion Space,
                  and from and after the Expansion Effective Date, the Original
                  Premises and the Expansion Space, collectively, shall be
                  deemed the Premises, as defined in the Lease. The Term for the
                  Expansion Space shall commence on the Expansion Effective Date
                  and end on the Expiration Date, which the parties hereby agree
                  is deemed to mean January 31, 2003. The Expansion Space is
                  subject to all the terms and conditions of the Lease except as
                  expressly modified herein and except that Tenant shall not be
                  entitled to receive any allowances, abatements or other
                  financial concessions granted with respect to the Original
                  Premises unless such concessions are expressly provided for
                  herein with respect to the Expansion Space.

            B.    The Expansion Effective Date shall be delayed to the extent
                  that Landlord fails to deliver possession of the Expansion
                  Space for any reason, including but not limited to, holding
                  over by prior occupants. Any such delay in the Expansion
                  Effective Date shall not subject Landlord to any liability for
                  any loss or damage resulting therefrom. If the Expansion
                  Effective Date is delayed, the Expiration Date under the Lease
                  shall not be similarly extended.

      II. BASE RENT.

            In addition to Tenant's obligation to pay Base Rent for the Original
            Premises, Tenant shall pay Landlord the sum of One Hundred Seventy
            One Thousand One Hundred Thirty Seven and 60/100 Dollars
            ($171,137.60) as aggregate Base Rent for the Expansion Space in
            forty four (44) monthly installments ("Monthly Rental") as follows:

            A.    Eight (8) equal installments of Three Thousand Seven Hundred
                  Three and 99/100 Dollars ($.3,703.99) each payable on or
                  before the first day of each month during the period beginning
                  June 1, 1999, and ending January 31, 2000, provided that the
                  installment of Monthly Rental for the first full calendar
                  month of the Term for the Expansion Space shall be payable
                  upon the execution of this Amendment by Tenant.

            B.    Twelve (12) equal installments of Three Thousand Eight Hundred
                  Fourteen and 76/100 Dollars ($3,814.76) each payable on or
                  before the first day of each month during the period beginning
                  February 1, 2000, and ending January 31, 2001.

                                       1
<PAGE>   7
            C.    Twelve (12) equal installments of Three Thousand Nine Hundred
                  Twenty Nine and 42/100 Dollars ($3,929.42) each payable on or
                  before the first day of each month during the period beginning
                  February 1, 2001, and ending January 31, 2002.

            D.    Twelve (12) equal installments of Four Thousand Forty Seven
                  and 96/100 Dollars ($4,047.96) each payable on or before the
                  first day of each month during the period beginning February
                  1, 2002, and ending January 31, 2003.

            All such Base Rent shall be payable by Tenant in accordance with the
            terms of the Lease.

      III.  ADDITIONAL SECURITY DEPOSIT. Upon Tenant's execution hereof, Tenant
            shall pay Landlord the sum of Three Thousand Seven Hundred Three and
            99/100 Dollars ($3,703.99) which is added to and becomes part of the
            Security Deposit, if any, held by Landlord as provided under the
            Lease as security for payment of Rent and the performance of the
            other terms and conditions of the Lease by Tenant. Accordingly,
            simultaneous with the execution hereof, the Security Deposit is
            increased from $28,781.44 to $32,485.43.

      IV.   TENANT'S SHARE AND OPERATING COSTS.

            A.    Effective as of the date of this Amendment, the "Total
                  Building Rentable Area", as defined in Section 3(c) of the
                  Lease, shall be deemed to mean 390,721 rentable square feet,
                  rather than 388,832 rentable square feet, as previously
                  provided in the Lease.

            B.    Effective as of the date of this Amendment, Tenant's Share for
                  the Original Premises is deemed to mean 1.7834% rather than
                  1.8%.

            C.    For the period commencing with the Expansion Effective Date
                  and ending on the Expiration Date, Tenant's Share for the
                  Expansion Space shall be deemed to mean .5968%. For the
                  period commencing with the Expansion Effective Date and ending
                  on the Expiration Date, Tenant shall pay, as Additional Rent,
                  for Tenant's Share of Operating Costs applicable to the
                  Expansion Space in accordance with the terms of Section 3 of
                  the Lease.

      V.    IMPROVEMENTS TO EXPANSION SPACE.

            A.    CONDITION OF EXPANSION SPACE AND THE ORIGINAL PREMISES. Tenant
                  has inspected the Expansion Space and the Original Premises
                  and agrees to accept the same "as is" without any agreements,
                  representations, understandings or obligations on the part of
                  Landlord to perform any alterations, repairs or improvements,
                  except as may be expressly provided otherwise in this
                  Amendment.

            B.    COST OF IMPROVEMENTS TO EXPANSION SPACE AND THE ORIGINAL
                  PREMISES. Provided Tenant is not in default, Tenant shall be
                  entitled to receive an improvement allowance (the "Improvement
                  Allowance") in an amount not to exceed Thirteen Thousand Nine
                  Hundred Ninety Two 00/100 Dollars ($13,992.00) to be applied
                  toward the cost of performing initial construction, alteration
                  or improvement of the Expansion Space and the Original
                  Premises, including but not limited to the cost of space
                  planning, design and related architectural and engineering
                  services. In the event the total cost of the initial
                  improvements to the Expansion Space and the Original Premises
                  exceeds the Improvement Allowance, Tenant shall pay for such
                  excess upon demand. The entire unused balance of the
                  Improvement Allowance if any, shall accrue to the sole benefit
                  of Landlord. Landlord shall pay such Improvement Allowance
                  directly to the contractors retained to perform the
                  construction, design or related improvement work to the
                  Expansion Space and the Original Premises. Landlord shall be
                  entitled to deduct from the Improvement Allowance a
                  construction management fee for Landlord's oversight of the
                  improvements in an amount equal to four and half percent
                  (4.5%) of the total cost of such improvements.

            C.    RESPONSIBILITY FOR IMPROVEMENTS TO EXPANSION SPACE AND THE
                  ORIGINAL PREMISES. Landlord shall enter into a direct contract
                  for the initial improvements to the Expansion Space and the
                  Original Premises with a general contractor selected by
                  Landlord. Tenant shall devote such time in

                                       2
<PAGE>   8
                  consultation with Landlord or Landlord's architect as may be
                  required to provide all information Landlord deems necessary
                  in order to enable Landlord to complete, and obtain Tenant's
                  written approval of, the plans for the initial improvements to
                  the Expansion Space and the Original Premises in a timely
                  manner. All plans for the initial improvements to the
                  Expansion Space and the Original Premises shall be subject to
                  Landlord's consent, which consent shall not be unreasonably
                  withheld. If the cost of such improvements exceeds the
                  Improvement Allowance, then prior to commencing any
                  construction of improvements to the Expansion Space and the
                  Original Premises, Landlord shall submit to Tenant a written
                  estimate setting forth the anticipated cost, including but not
                  limited to the cost of space planning, design and related
                  architectural and engineering services, labor and materials,
                  contractor's fees, and permit fees. Within a reasonable time
                  thereafter, Tenant shall either notify Landlord in writing of
                  its approval of the cost estimate or specify its objections
                  thereto and any desired changes to the proposed improvements.
                  In the event Tenant notifies Landlord of such objections and
                  desired changes, Tenant shall work with Landlord to reach a
                  mutually acceptable alternative cost estimate.

            D.    Tenant acknowledges that the improvement work in the Expansion
                  Space and the Original Premises may be performed by Landlord
                  in the Expansion Space and Original Premises during normal
                  business hours prior to or subsequent to the Expansion
                  Effective Date. Landlord and Tenant agree to cooperate with
                  each other in order to enable such work to be performed in a
                  timely manner and with as little inconvenience to the
                  operation of Tenant's business as is reasonably possible.
                  Notwithstanding anything herein to the contrary, any delay in
                  the completion of the improvement work or inconvenience
                  suffered by Tenant during the performance of such work; shall
                  not subject Landlord to any liability for any loss or damage
                  resulting therefrom or entitle Tenant to any credit, abatement
                  or adjustment of Rent or other sums payable under the Lease.

      VI.   EARLY ACCESS TO EXPANSION SPACE. During any period that Tenant shall
            be permitted to enter the Expansion Space prior to the Expansion
            Effective Date (e.g., to perform alterations or improvements, if
            any), Tenant shall comply with all terms and provisions of the
            Lease, except those provisions requiring payment of Base Rent or
            Additional Rent as to the Expansion Space. If Tenant takes
            possession of the Expansion Space prior to the Expansion Effective
            Date for any reason whatsoever (other than the performance of work
            in the Expansion Space with Landlord's prior approval), such
            possession shall be subject to all the terms and conditions of the
            Lease and this Amendment, and Tenant shall pay Base Rent and
            Additional Rent as applicable to the Expansion Space to Landlord on
            a per diem basis for each day of occupancy prior to the Expansion
            Effective Date.

      VII.  OTHER PERTINENT PROVISIONS. Landlord and Tenant agree that,
            effective as of the date hereof (unless different effective date(s)
            is/are specifically referenced in this Section), the Lease shall be
            amended in the following additional respects:

            A.    LANDLORD ADDRESSES. Section 20 of the Lease, "Notices", and
                  the first (1st) sentence of Section 2(a) of the Lease are
                  modified to reflect that the address for notices to Landlord
                  and payments of Rent shall be as follows:

                  EOP-Lakeside Office, L.L.C.
                  c/o Equity Office Properties Trust
                  5775B Glenridge Drive, Suite 500
                  Atlanta, Georgia 30323
                  Attention: Building Manager

                  with a copy to:

                  Equity Office Properties Trust
                  Two North Riverside Plaza
                  Suite 2200
                  Chicago, Illinois 60606
                  Attention: Regional Counsel - Southeast Region

                                       3
<PAGE>   9
                  Payments of Rent only shall be made payable to the order of
                  EQUITY OFFICE PROPERTIES and forwarded to the following
                  address:

                  EOP Operating Limited Partnership,
                  as agent for EOP-Lakeside Office, L.L.C.
                  P.O. Box 931591
                  Atlanta, Georgia 31193-1591

            B.    PARKING AND ACCESS AREAS. Section 27, "Parking and Access
                  Areas", of the Lease, regarding the parking spaces which are
                  available to Tenant and its employees, remains unmodified
                  hereby and, effective as of the Expansion Effective Date with
                  respect to the Expansion Space, ten (10) additional unreserved
                  parking spaces shall be made available to Tenant with respect
                  to the Expansion Space for parking by Tenant and its
                  employees, free of charge, during the remainder of the Term.
                  The use of such parking spaces shall be subject to the terms
                  of Section 27 and Section 44 of the Lease. The parking spaces
                  available in connection with the Original Premises remains
                  unchanged for the remainder of the Term.

            C.    Section 9 of Exhibit C, "Rules and Regulations", of the Lease
                  is modified so that all references to "7:00 a.m." in Section 9
                  of Exhibit C shall be deemed to mean "8:00 a.m.".

      VIII. CONTINGENCY. The parties hereto acknowledge that the Expansion Space
            currently is subject to the terms of that certain lease agreement
            dated April 24, 1995, as amended (the "Prior Lease") by and between
            Landlord and PM Group Life Insurance Company ("Prior Tenant"). This
            Amendment specifically is contingent upon Landlord entering into an
            agreement with the Prior Tenant to terminate the Prior Lease with
            respect to the Expansion Space (the "Prior Lease Termination
            Agreement"). If the Prior Lease Termination Agreement has not been
            executed on or before May 21, 1999 (the "Contingency Date"), then
            Landlord may terminate this Amendment by providing written notice
            thereof to Tenant on or before the earlier of (i) five (5) days
            after the Contingency Date and (ii) execution of the Prior Lease
            Termination Agreement by Prior Tenant, whereupon, this Amendment
            shall be null and void and of no force or effect and the Lease shall
            continue in full force and effect as if this Amendment had not been
            executed.

      IX.   MISCELLANEOUS.

            A.    This Amendment sets forth the entire agreement between the
                  parties with respect to the matters set forth herein. There
                  have been no additional oral or written representations or
                  agreements. Under no circumstances shall Tenant be entitled to
                  any Rent abatement, improvement allowance, leasehold
                  improvements, or other work to the Premises, or any similar
                  economic incentives that may have been provided Tenant in
                  connection with entering into the Lease, unless specifically
                  set forth in this Amendment.

            B.    Except as herein modified or amended, the provisions,
                  conditions and terms of the Lease shall remain unchanged and
                  in full force and effect.

            C.    In the case of any inconsistency between the provisions of the
                  Lease and this Amendment, the provisions of this Amendment
                  shall govern and control.

            D.    Submission of this Amendment by Landlord is not an offer to
                  enter into this Amendment but rather is a solicitation for
                  such an offer by Tenant. Landlord shall not be bound by this
                  Amendment until Landlord has executed and delivered the same
                  to Tenant

            E.    The capitalized terms used in this Amendment shall have the
                  same definitions as set forth in the Lease to the extent that
                  such capitalized terms are defined therein and not redefined
                  in this Amendment.

            F.    Tenant hereby represents to Landlord that Tenant has dealt
                  with no broker in connection with this Amendment. Tenant
                  agrees to indemnify and hold Landlord, its members,
                  principals, beneficiaries, partners, officers, directors,
                  employees, mortgagee(s) and agents, and the respective
                  principals and members of any such agents (collectively, the
                  "Landlord

                                       4
<PAGE>   10
                  Related Parties") harmless from all claims of any brokers
                  claiming to have represented Tenant in connection with this
                  Amendment. Landlord hereby represents to Tenant that Landlord
                  has dealt with no broker in connection with this Amendment.
                  Landlord agrees to indemnify and hold Tenant, its members,
                  principals, beneficiaries, partners, officers, directors,
                  employees, and agents, and the respective principals and
                  members of any such agents (collectively, the "Tenant Related
                  Parties") harmless from all claims of any brokers claiming to
                  have represented Landlord in connection with this Amendment.

      IN WITNESS WHEREOF, Landlord and Tenant have duly executed this Amendment
as of the day and year first above written.

                                      LANDLORD:

                                      EOP-LAKESIDE OFFICE, L.L.C., a Delaware
                                      limited liability company

                                      By: EOP Operating limited Partnership, a
                                      Delaware limited partnership, its sole
                                      member

                                           By: Equity Office Properties Trust, a
                                               Maryland real estate investment
                                               trust, its managing general
                                               partner

                                               By: /s/ JEFF SWEENEY
                                                  ------------------------------
                                               Name: JEFF SWEENEY
                                                    ----------------------------
                                               Title: V.P. LEASING
                                                     ---------------------------

                                      TENANT:

                                      EXACTIUM, INC., a Delaware corporation

                                      By: /s/ JEANNE B. JAMBOR
                                         ---------------------------------------
                                      Name: JEANNE B. JAMBOR
                                           -------------------------------------
                                      Title: CHIEF FINANCIAL OFFICER
                                            ------------------------------------

                                       5
<PAGE>   11
                                    EXHIBIT A

                                Attach Floor Plan
                             Showing Expansion Space

                                  [FLOOR PLAN]

                                       6
<PAGE>   12
                                SECOND AMENDMENT

      THIS SECOND AMENDMENT (the "Amendment") is made and entered into as of
the 22nd day of June, 1999, by and between EOP-LAKESIDE OFFICE, L.L.C., a
Delaware limited liability company ("Landlord"), and EXACTIUM, INC., a Delaware
corporation ("Tenant").

                                   WITNESSETH

A.    WHEREAS, Landlord (as successor by merger to Beacon Properties, L.P.) and
      Tenant are parties to that certain lease dated the 4th day of December,
      1997, for space currently containing approximately 9,300 rentable square
      feet (the "Original Premises") described as Suite Nos. 200 and 250 on the
      2nd floor of the building commonly known as Lakeside Building B and the
      address of which is 5775-B Glenridge Drive, Atlanta, Georgia 30328 (the
      "Building"), which lease has been previously amended by instrument dated
      May 14, 1999, (the "First Amendment") (collectively, the "Lease"); and

B.    WHEREAS, Tenant has requested that additional space described as Suite 290
      containing approximately 1,338 rentable square feet on the 2nd floor of
      the Building shown on EXHIBIT A hereto (the "Expansion Space") be added to
      the Original Premises and that the Lease be appropriately amended and
      Landlord is willing to do the same on the terms and conditions hereinafter
      set forth;

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
      herein contained and other good and valuable consideration, the receipt
      and sufficiency of which are hereby acknowledged, Landlord and Tenant
      agree as follows:

I.    EXPANSION AND EFFECTIVE DATE. Effective as of the Expansion Effective Date
      (as hereinafter defined), the Premises, as defined in the Lease, is
      increased from 9,300 rentable square feet on the 2nd floor to 10,638
      rentable square feet on the 2nd floor by the addition of the Expansion
      Space, and from and after the Expansion Effective Date, the Original
      Premises and the Expansion Space, collectively, shall be deemed the
      Premises, as defined in the Lease. The Term for the Expansion Space shall
      commence on the Expansion Effective Date and end on the Expiration Date.
      The Expansion Space is subject to all the terms and conditions of the
      Lease except as expressly modified herein and except that Tenant shall not
      be entitled to receive any allowances, abatements or other financial
      concessions granted with respect to the Original Premises unless such
      concessions are expressly provided for herein with respect to the
      Expansion Space.

              A.  The Expansion Effective Date shall be the later to occur of
                  (i) August 1, 1999, ("Target Expansion Effective Date"), and
                  (ii) the date upon which Landlord's improvement work in the
                  Expansion Space has been substantially completed; provided,
                  however, that if Landlord shall be delayed in substantially
                  completing the Landlord's work in the Expansion Space as a
                  result of the occurrence of any of the following (a "Delay"):

                  1.    Tenant's failure to furnish information or to respond to
                        any request by Landlord for any approval or information
                        within any time period prescribed or, if no time period
                        is prescribed, then within two (2) business days of such
                        request; or

                  2.    Tenant's insistence on materials, finishes or
                        installations that have long lead times after having
                        first been informed by Landlord that such materials,
                        finishes or installations will cause a Delay; or

                  3.    Changes in any plans and specifications requested by
                        Tenant after approval of same; or

                  4.    The performance or nonperformance by a person or entity
                        employed by Tenant in the completion of any work (all
                        such work and such persons or entities being subject to
                        the prior approval of Landlord); or

                  5.    Any request by Tenant that Landlord delay the completion
                        of any of the Landlord's work; or

                  6.    Any delay resulting from Tenant having taken possession
                        of the Expansion Space for any reason prior to
                        substantial completion of the Landlord's work; or

                                       1
<PAGE>   13
                  7.    Any other delay chargeable to Tenant, its agents,
                        employees or independent contractors;

                  then, for purposes of determining the Expansion Effective
                  Date, the date of substantial completion shall be deemed to be
                  the day that said Landlord's work would have been
                  substantially completed absent any such Delay(s). The
                  Expansion Space shall be deemed to be substantially completed
                  on the date that Landlord reasonably determines that all
                  Landlord's work has been performed (or would have been
                  performed absent any Delays), other than any details of
                  construction, mechanical adjustment or any other matter, the
                  noncompletion of which does not materially interfere with
                  Tenant's use of the Expansion Space. The adjustment of the
                  Expansion Effective Date and, accordingly, the postponement of
                  Tenant's obligation to pay Rent on the Expansion Space, shall
                  be Tenant's sole remedy and shall constitute full settlement
                  of all claims that Tenant might otherwise have against
                  Landlord by reason of the Expansion Space not being ready for
                  occupancy by Tenant on the Target Expansion Effective Date.

            B.    In addition to the postponement, if any, of the Expansion
                  Effective Date as a result of the applicability of Paragraph
                  I.A. of this Amendment, the Expansion Effective Date shall be
                  delayed to the extent that Landlord fails to deliver
                  possession of the Expansion Space for any other reason (other
                  than Delays by Tenant), including but not limited to, holding
                  over by prior occupants. Any such delay in the Expansion
                  Effective Date shall not subject Landlord to any liability for
                  any loss or damage resulting therefrom. If the Expansion
                  Effective Date is delayed, the Termination Date under the
                  Lease shall not be similarly extended.

      II.   BASE RENT

            In addition to Tenant's obligation to pay Base Rent for the Original
            Premises, Tenant shall pay Landlord the sum of $93,941.10 as
            aggregate Base Rent for the Expansion Space in forty two (42)
            monthly installments ("Monthly Rental") as follows:

            A.    Six (6) equal installments of $2,125.19 each payable on or
                  before the first day of each month during the period beginning
                  August 1, 1999, and ending January 31, 2000, provided that the
                  installment of Monthly Rental for the first full calendar
                  month of the Term for the Expansion Space shall be payable
                  upon the execution of this Amendment by Tenant.

            B.    Twelve (12) equal installments of $2,188.75 each payable on or
                  before the first day of each month during the period beginning
                  February 1, 2000, and ending January 31, 2001.

            C.    Twelve (12) equal installments of $2,254.53 each payable on or
                  before the first day of each month during the period beginning
                  February 1, 2001, and ending January 31, 2002.

            D.    Twelve (12) equal installments of $2,322.55 each payable on or
                  before the first day of each month during the period beginning
                  February 1, 2002, and ending January 31, 2003.

            All such Base Rent shall be payable by Tenant in accordance with the
            terms of the Lease.

            Landlord and Tenant acknowledge that the foregoing schedule is based
            on the assumption that the Expansion Effective Date is the Target
            Expansion Effective Date. If the Expansion Effective Date is other
            than the Target Expansion Effective Date, the schedule set forth
            above with respect to the payment of any installments of Base Rent
            for the Expansion Space shall be appropriately adjusted on a per
            diem basis to reflect the actual Expansion Effective Date and the
            actual Expansion Effective Date shall be set forth in a confirmation
            letter to be prepared by Landlord. However, the effective date of
            any increases or decreases in the Base Rent rate shall not be
            postponed as a result of an adjustment of the Expansion Effective
            Date as provided above.

      III.  ADDITIONAL SECURITY DEPOSIT. Upon Tenant's execution hereof, Tenant
            shall pay Landlord the sum of $2,125.19 which is added to and
            becomes part of the Security Deposit, if any, held by Landlord as
            provided under the Lease as security for payment of Rent and the
            performance of the other terms and conditions of the

                                       2
<PAGE>   14
            Lease by Tenant. Accordingly, simultaneous with the execution
            hereof, the Security Deposit is increased from $32,485.43 to
            $34,610.62.

      IV.   TENANT'S SHARE AND OPERATING COSTS. For the period commencing with
            the Expansion Effective Date and ending on the Expiration Date,
            Tenant's Share for the Expansion Space is 0.3424%. For the period
            commencing with the Expansion Effective Date and ending on the
            Expiration Date, Tenant shall pay, as Additional Rent, for Tenant's
            Share of Operating Costs applicable to the Expansion Space in
            accordance with the terms of Section 3 of the Lease.

      V.    IMPROVEMENTS TO EXPANSION SPACE.

            A.    CONDITION OF EXPANSION SPACE. Tenant has inspected the
                  Expansion Space and agrees to accept the same "as is" without
                  any agreements, representations, understandings or obligations
                  on the part of Landlord to perform any alterations, repairs or
                  improvements, except as may be expressly provided otherwise in
                  this Amendment.

            B.    COST OF IMPROVEMENTS TO EXPANSION SPACE. Provided Tenant is
                  not in default, Tenant shall be entitled to receive an
                  improvement allowance (the "Expansion Improvement Allowance")
                  in an amount not to exceed $8,028.00 (i.e., $6.00 per rentable
                  square foot of the Expansion Space) to be applied toward the
                  cost of performing initial construction, alteration or
                  improvement of the Expansion Space, including but not limited
                  to the cost of space planning, design and related
                  architectural and engineering services. In the event the total
                  cost of the initial improvements to the Expansion Space
                  exceeds the Expansion Improvement Allowance, Tenant shall pay
                  for such excess upon demand. The entire unused balance of the
                  Expansion Improvement Allowance, if any, shall accrue to the
                  sole benefit of Landlord. Landlord shall pay such Expansion
                  Improvement Allowance directly to the contractors retained to
                  perform the construction, design or related improvement work
                  to the Expansion Space. Landlord shall be entitled to deduct
                  from the Expansion Improvement Allowance a construction
                  management fee for Landlord's oversight of the improvements in
                  an amount equal to four and half percent (4.5%) of the total
                  cost of such improvements.

            C.    RESPONSIBILITY FOR IMPROVEMENTS TO EXPANSION SPACE. Landlord
                  shall enter into a direct contract for the initial
                  improvements to the Expansion Space with a general contractor
                  selected by Landlord. Tenant shall devote such time in
                  consultation with Landlord or Landlord's architect as may be
                  required to provide all information Landlord deems necessary
                  in order to enable Landlord to complete, and obtain Tenant's
                  written approval of, the plans for the initial improvements to
                  the Expansion Space in a timely manner. All plans for the
                  initial improvements to the Expansion Space shall be subject
                  to Landlord's consent, which consent shall not be unreasonably
                  withheld. If the cost of such improvements exceeds the
                  Expansion Improvement Allowance. then prior to commencing any
                  construction of improvements to the Expansion Space,
                  Landlord shall submit to Tenant a written estimate setting
                  forth the anticipated cost, including but not limited to the
                  cost of space planning, design and related architectural and
                  engineering services, labor and materials, contractor's fees,
                  and permit fees. Within a reasonable time thereafter, Tenant
                  shall either notify Landlord in writing of its approval of the
                  cost estimate or specify its objections thereto and any
                  desired changes to the proposed improvements. In the event
                  Tenant notifies Landlord of such objections and desired
                  changes, Tenant shall work with Landlord to reach a mutually
                  acceptable alternative cost estimate.

      VI.   EARLY ACCESS TO EXPANSION SPACE. During any period that Tenant shall
            be permitted to enter the Expansion Space prior to the Expansion
            Effective Date (e.g., to perform alterations or improvements, if
            any), Tenant shall comply with all terms and provisions of the
            Lease, except those provisions requiring payment of Base Rent or
            Additional Rent as to the Expansion Space. If Tenant takes
            possession of the Expansion Space prior to the Expansion Effective
            Date for any reason whatsoever (other than the performance of work
            in the Expansion Space with Landlord's prior approval), such
            possession shall be subject to all the terms and conditions of the
            Lease and this Amendment, and Tenant shall pay Base Rent and
            Additional Rent as applicable to the Expansion Space to Landlord on
            a per diem basis for each day of occupancy prior to the Expansion
            Effective Date.

      VII.  OTHER PERTINENT PROVISIONS. Landlord and Tenant agree that,
            effective as of the

                                       3
<PAGE>   15
            date of this Amendment (unless different effective date(s) is/are
            specifically referenced in this Section), the Lease shall be amended
            in the following additional respects:

            A     PARKING AND ACCESS AREAS. Section 27, "Parking and Access
                  Areas", of the Lease, regarding the parking spaces which are
                  available to Tenant and its employees, remains unmodified
                  hereby and, in accordance with said Section 27, effective as
                  of the Expansion Effective Date with respect to the Expansion
                  Space, six (6) additional unreserved parking spaces shall be
                  made available to Tenant with respect to the Expansion Space
                  for parking by Tenant and its employees, free of charge,
                  during the remainder of the Term. The use of such parking
                  spaces shall be subject to the terms of Section 27 and Section
                  44 of the Lease. The parking spaces available in connection
                  with the Original Premises remains unchanged for the remainder
                  of the Term.

            B.    DELETED PROVISION. Special Stipulation 1, "Right of First
                  Refusal", of Exhibit F of the Lease has been satisfied or
                  otherwise expired and is hereby deleted in its entirety and is
                  of no further force and effect.

      VIII. MISCELLANEOUS.

            A.    This Amendment sets forth the entire agreement between the
                  parties with respect to the matters set forth herein. There
                  have been no additional oral or written representations or
                  agreements. Under no circumstances shall Tenant be entitled to
                  any Rent abatement, improvement allowance, leasehold
                  improvements, or other work to the Premises, or any similar
                  economic incentives that may have been provided Tenant in
                  connection with entering into the Lease, unless specifically
                  set forth in this Amendment.

            B.    Except as herein modified or amended, the provisions,
                  conditions and terms of the Lease shall remain unchanged and
                  in full force and effect.

            C.    In the case of any inconsistency between the provisions of the
                  Lease and this Amendment, the provisions of this Amendment
                  shall govern and control.

            D.    Submission of this Amendment by Landlord is not an offer to
                  enter into this Amendment but rather is a solicitation for
                  such an offer by Tenant. Landlord shall not be bound by this
                  Amendment until Landlord has executed and delivered the same
                  to Tenant.

            E.    The capitalized terms used in this Amendment shall have the
                  same definitions as set forth in the Lease to the extent that
                  such capitalized terms are defined therein and not redefined
                  in this Amendment.

            F.    Tenant hereby represents to Landlord that Tenant has dealt
                  with no broker in connection with this Amendment. Tenant
                  agrees to indemnify and hold Landlord, its members,
                  principals, beneficiaries, partners, officers, directors,
                  employees, mortgagee(s) and agents, and the respective
                  principals and members of any such agents (collectively, the
                  "Landlord Related Parties") harmless from all claims of any
                  brokers claiming to have represented Tenant in connection with
                  this Amendment. Landlord hereby represents to Tenant that
                  Landlord has dealt with no broker in connection with this
                  Amendment. Landlord agrees to indemnify and hold Tenant, its
                  members, principals, beneficiaries, partners, officers,
                  directors, employees, and agents, and the respective
                  principals and members of any such agents (collectively, the
                  "Tenant Related Parties") harmless from all claims of any
                  brokers claiming to have represented Landlord in connection
                  with this Amendment.

                                       4
<PAGE>   16
      IN WITNESS WHEREOF, Landlord and Tenant have duly executed this Amendment
as of the day and year first above written.

                                      LANDLORD:

                                      EOP-LAKESIDE OFFICE, L.L.C., A DELAWARE
                                      LIMITED LIABILITY COMPANY

                                      By: EOP Operating Limited Partnership, a
                                          Delaware limited partnership, its sole
                                          member

                                          By: Equity Office Properties Trust, a
                                              Maryland real estate investment
                                              trust, its managing general
                                              partner

                                              By: /s/ JEFF SWEENEY
                                                 -------------------------------
                                              Name: JEFF SWEENEY
                                                   -----------------------------
                                              Title: V. P. LEASING
                                                    ----------------------------

                                      TENANT:

                                      EXACTIUM, INC., A DELAWARE CORPORATION

                                      By: /s/ JEANNE B. JAMBOR
                                         ---------------------------------------
                                      Name: JEANNE B. JAMBOR
                                           -------------------------------------
                                      Title: CFO
                                            ------------------------------------

                                       5
<PAGE>   17
                                   EXHIBIT A

                                 Expansion Space

                                  [FLOORPLAN]

                                       6
<PAGE>   18
                     [BEACON MANAGEMENT COMPANY LETTERHEAD]

December 12, 1997

Ms. Jeannie Jambor
Director of Finance
& Administration
5775 - B Glenridge Drive
Suite 200
Atlanta, Georgia 30328

RE:    New Lease Agreement between BEACON PROPERTIES, L.P., a Delaware limited
       partnership (the "Landlord"), and EXACTIUM, INC. (the "Tenant").

Dear Jeannie:

Enclosed please find one (1) fully executed original of the New Lease Agreement
for Exactium. Please retain this original for your records.

Feel free to call if you should require any further assistance in this matter.

Best regards,

/s/ CANDY WALTON

Candy Walton
Leasing Assistant

Enclosure

cc:     Ms. Lee Eastwood - w/copy of enclosure
<PAGE>   19

                                 LEASE AGREEMENT

                                    LAKESIDE

                                ATLANTA, GEORGIA

LANDLORD:             BEACON PROPERTIES, L.P.

TENANT:               EXACTIUM, INC.

BUILDING:             5775-B

SUITE:                200

SQ. FT.:              6,968 RENTABLE SQUARE FEET

TERM:                 FIVE (5) YEARS

<PAGE>   20

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
Item                                                                       Page
----                                                                       ----
<S>                                                                        <C>
1.  PREMISES AND TERM ..................................................     1

2.  RENT ...............................................................     2

3.  REIMBURSEMENT FOR INCREASES IN OPERATING EXPENSES AND ..............     3

4.  DELIVERY OF THE PREMISES ...........................................     6

5.  ACCEPTANCE OF THE PREMISES .........................................     7

6.  USE ................................................................     7

7.  CARE OF THE PREMISES ...............................................     7

8.  SERVICES ...........................................................     9

9.  DESTRUCTION OR DAMAGE TO PREMISES ..................................     9

10. DEFAULT BY TENANT; LANDLORD'S REMEDIES .............................    10

11. ASSIGNMENT AND SUBLETTING ..........................................    12

12. CONDEMNATION .......................................................    14

13. INSPECTIONS ........................................................    15

14. SUBORDINATION ......................................................    15

15. INDEMNIFICATION AND HOLD HARMLESS ..................................    16

16. TENANT'S INSURANCE .................................................    16

17. REMEDIES CUMULATIVE ................................................    17

18. ENTIRE AGREEMENT - NO WAIVER .......................................    17

19. HOLDING OVER .......................................................    17

20. NOTICES ............................................................    17

21. HEIRS, SUCCESSORS, AND ASSIGNS - PARTIES ...........................    18
</TABLE>

                                       i
<PAGE>   21

<TABLE>
<S>                                                                        <C>
22. ATTORNEY'S FEES ....................................................    18

23. TIME OF THE ESSENCE ................................................    18

24. NO ESTATE IN LAND ..................................................    18

25. SECURITY DEPOSIT ...................................................    18

26. COMPLETION OF THE PREMISES .........................................    19

27. PARKING AND ACCESS AREAS ...........................................    19

28. RULES AND REGULATIONS ..............................................    19

29. RIGHT TO RELOCATE ..................................................    19

30. LATE PAYMENTS -- ACCORD AND SATISFACTION ...........................    20

31. ESTOPPEL CERTIFICATE ...............................................    20

32. SEVERABILITY AND INTERPRETATION ....................................    20

33. MULTIPLE TENANTS ...................................................    20

34. FORCE MAJEURE ......................................................    20

35. QUIET ENJOYMENT ....................................................    21

36. BROKERAGE COMMISSION; INDEMNITY ....................................    21

37. EXCULPATION OF LANDLORD ............................................    21

38. ORIGINAL INSTRUMENT ................................................    21

39. APPLICABLE LAW .....................................................    21

40. NO RECORDATION OF LEASE ............................................    21

41. HAZARDOUS WASTES ...................................................    21

42. BANKRUPTCY .........................................................    22

43. SIGNS ..............................................................    25

44. CONTROL OF COMMON AREAS AND PARKING FACILITIES .....................    25
</TABLE>

                                       ii
<PAGE>   22

<TABLE>
<S>                                                                        <C>
45. NO SMOKING .........................................................    26

46. PRIOR OCCUPANCY ....................................................    26

47. GUARANTEE ..........................................................    26

48. LEASE BINDING UPON DELIVERY ........................................    26

49. SPECIAL STIPULATIONS ...............................................    26

50. HEADINGS ...........................................................    26

51. SURRENDER OF LEASE NOT MERGER ......................................    27

52. MORTGAGEE PROTECTION ...............................................    27

53. INTERFERENCE .......................................................    27

54. NO PARTNERSHIPS ....................................................    27

55. ADA ................................................................    27

56. USE OF PRONOUN, RELATIONSHIP .......................................    27

57. SURRENDER ..........................................................    27

58. WAIVER OF JURY TRIAL ...............................................    27

59. NO THIRD PARTY BENEFICIARY .........................................    28

60. REPRESENTATIONS OF TENANT ..........................................    28
</TABLE>

Exhibit "A" - Space Plan of Premises

Exhibit "B" - Legal Description of Land

Exhibit "C" - Rules and Regulations

Exhibit "D" - Work Agreement

Exhibit "E" - Prohibited Use of Premises

Exhibit "F" - Special Stipulations

Exhibit "G" - Complex Standard Services

Exhibit "H" - Guaranty

                                      iii
<PAGE>   23

                                   DEFINITIONS
<TABLE>
<CAPTION>
Term                                                                   Paragraph
----                                                                   ---------
<S>                                                            <C>
ADA                                                                           54
Additional Rental                                                    Exhibit "D"
Adjusted Monthly Rental                                                     2(b)
Allowance                                                            Exhibit "D"
Bankruptcy Code                                                               42
Base Rent                                                                      2
Complex                                                                     1(b)
Complex Operating Hours                                              Exhibit "G"
Complex Standard Services                                            Exhibit "G"
Commencement Date                                                           1(c)
Common Areas                                                                  44
Expiration Date                                                             1(c)
Hazardous Substances or Materials                                             41
Holidays                                                             Exhibit "G"
Initial Calendar Year                                                       3(a)
Initial Monthly Rental                                                      2(a)
Initial Operating Costs                                                     3(a)
Insolvency Laws                                                               42
Landlord                                                                 Caption
Lease                                                                    Caption
Lease Year                                                                  1(d)
Monthly Rental                                                                 2
Mortgagee                                                                  14(a)
Operating Costs                                                             3(b)
Premises                                                                    1(a)
Property                                                                    1(e)
Rent                                                                           2
Rentable Square Foot (Feet)                                                 1(b)
Rules                                                          6 and Exhibit "F"
Scheduled Commencement Date                                                    4
Services                                                                      37
Tenant                                                                   Caption
Tenant's Share                                                              3(c)
Term                                                                        1(c)
Work Agreement                                                                 4
</TABLE>

<PAGE>   24

                                 LEASE AGREEMENT

        THIS LEASE AGREEMENT (the "Lease"), made this 4th day of December 1997,
by and between BEACON PROPERTIES, L.P. ("Landlord") a Delaware limited
partnership which has as its address for all purposes hereunder as follows:

                Beacon Properties, L.P. c/o
                Beacon Properties Corporation
                50 Rowes Wharf Boston,
                Massachusetts 02110
                Attn: General Counsel

        with a copy of all notices to:

               Beacon Properties, L.P.
               115 Perimeter Center Place, Suite 225
               Atlanta, Georgia 30348

and EXACTIUM, INC. ("Tenant"), a corporation of the State of Delaware which has
as its address:

               5775-B Glenridge Drive
               Suite 200
               Atlanta, GA 30328

                                   WITNESSETH:

        WHEREAS, the Mutual Life Insurance Company of New York ("MONY") and
ARAD, Inc. ("ARAD") did enter into a Lease Agreement (the "Existing Lease"),
dated as of December 5, 1996, for space in the Building known as "Suite 410."

        WHEREAS, MONY has conveyed its interest as "Landlord" in the Existing
Lease to Landlord.

        WHEREAS, ARAD has conveyed its interest as "Tenant" in the Existing
Lease to Tenant.

        WHEREAS, Landlord and Tenant desire to enter into this Lease, to replace
the Existing Lease.

1.      PREMISES AND TERM

        (a) Landlord hereby rents and leases to Tenant, and Tenant hereby rents
and leases from Landlord, the following described space (the "Premises"):

                Floor: 2nd
                Suite: 200
                Square Feet: 6,968 rentable square feet
                Tenant's Share: 1.8%
                (subject to re-calculation pursuant to Section 3(c))

        (b) The Premises are more particularly shown and outlined on the space
plans attached hereto as Exhibit "A", and made a part hereof, designated as
Suite 200 in the building (the "Building") known as 5775-B Glenridge Drive,
having an address of 5775-B Glenridge Drive, in the development known as
Lakeside comprised of the Building and four (4) other buildings (the five (5)
buildings including the Building being collectively referred to as the
"Complex".) For all purposes under this Lease, Landlord and Tenant have agreed
that the Premises shall be deemed to

<PAGE>   25

include 6,968 rentable square feet of area (including both Tenant's exclusive
usable area contained in the Premises and common areas in the Complex
attributable to Tenant's usable area). Landlord and Tenant acknowledge to each
other that each party has had the opportunity to measure the square footage
contained in the Premises and waive any claims after the date of this Lease to
adjust the rental or amounts due under this Lease resulting from any error in
the measurement of the square footage of the Premises.

        (c) The term of this Lease (the "Term") shall commence (the
"Commencement Date"), subject to the provisions of Paragraph 4 herein, on the
earlier of (i) January 1, 1998 (the "Scheduled Commencement Date") or (ii) the
date on which Landlord delivers possession of the Premises to Tenant in
accordance with Paragraph 4 of this Lease or the date Landlord would have so
delivered possession of the Premises but for any omission, delay or default
caused by the Tenant or other "Tenant Delays" (as hereinafter defined in the
Work Agreement) and end at midnight on the last day of the month in which the
fifth (5th) anniversary of the Commencement Date occurs (the "Expiration Date")
or on such earlier date as the Term may expire or be terminated pursuant to the
provisions of this Lease or pursuant to law. This Lease shall be effective and
enforceable between Landlord and Tenant upon its execution and delivery, whether
such execution and delivery occurs on, prior to, or after the Commencement Date.
Upon the Commencement Date, the Existing Lease shall be deemed null, void and of
no further force and effect, and Tenant shall have vacated the space leased
under the Existing Lease and left such space in the condition required
thereunder.

        (d) "Lease Year" as used herein shall mean (i) each and every twelve
(12) month period during the Term of this Lease, or (ii) in the event of Lease
expiration or termination, the period between the end of the then most recently
completed twelve (12) month period and said expiration or termination. The first
such twelve (12) month period shall commence on the Commencement Date.

        (e) The Complex and land upon which said Complex is located, described
on Exhibit "B", attached hereto and by reference incorporated herein, is
referred to as the "Property". All drives, parking areas, parking lots,
walkways, terraces and landscaped areas that shall be used and maintained in
connection with the Complex that are contiguous to the Property whether in fact
located within the boundaries of the Land for purposes of this Lease shall be
included in the definition of "Complex" and "Property".

        (f) Subject to the terms herein provided, the Premises shall include the
appurtenant right to use, in common with others, on a non-exclusive basis,
public lobbies, entrances, stairs, corridors, elevators, all drives, parking
areas, parking lots and other public portions of the Complex. All the windows
and outside walls of the Premises, and any space in the Premises used for
shafts, pipes, conduits, ducts, telephone ducts and equipment, electric or other
utilities, sinks or other Building facilities, and the use thereof and access
thereto through the Premises for the purposes of operation, maintenance,
inspection, display and repairs are hereby reserved to Landlord. No easement for
light, air or view, is granted or implied hereunder, and the reduction or
elimination of Tenant's light, air or view will not affect Tenant's liability
under this Lease.

2.      RENT

        (a) Tenant shall pay to Landlord at P.O. Box 102309, Atlanta, Georgia
30368-2309, or at such other place as Landlord may designate in writing, without
demand, deduction or set off, an annual rental for each year of the Term in the
amounts set forth hereinbelow (the "Base Rent"):

<TABLE>
<CAPTION>
          Lease Year     Base Rent P.S.F.     Base Monthly     Base Annual Rent
          ----------     ----------------     ------------     ----------------
<S>                      <C>                  <C>              <C>
               1              $18.50           $10,742.33        $128,908.00
               2              $19.06           $11,067.51        $132,810.08
               3              $19.63           $11,398.49        $136,781.84
               4              $20.22           $11,741.08        $140,892.96
               5              $20.83           $12,095.29        $145,143.44
</TABLE>

        (b) Base Rent shall be due and payable in equal monthly installments
(the "Monthly Rental") in advance on the first (1st) day of each calendar month
during the Term. The term "Rent" as used herein shall mean the Monthly Rental,
"Additional Rent" (as that term is herein defined) and any additional amounts or
charges due from Tenant hereunder.

                                       2
<PAGE>   26
        (c) Should this Lease commence at any time other than the first day of a
calendar month, or terminate at any time other than the last day of a calendar
month, the amount of Rent due from Tenant shall be proportionately adjusted
based on that portion of the month that this Lease is in effect.

        (d) At all times that Landlord shall direct Tenant to pay Monthly Rental
or Additional Rental to a "lockbox" or other depository whereby checks issued in
payment of Rent are initially cashed or deposited by a person or entity other
than Landlord (albeit on Landlord's authority), then, for any and all purposes
under this Lease: (i) Landlord shall not be deemed to have accepted such payment
until ten (10) days after the date on which Landlord shall have actually
received such funds, and (ii) Landlord shall be deemed to have accepted such
payment if (and only if) within said ten (10) day period, Landlord shall not
have refunded (or attempted to refund) such payment to Tenant. Nothing contained
in the immediately preceding sentence shall be construed to place Tenant in
default of Tenant's obligation to pay Rent if and for so long as Tenant shall
timely pay the rent required pursuant to this Lease in the manner designated by
Landlord.

3.      REIMBURSEMENT FOR INCREASES IN OPERATING EXPENSES AND TAXES

        (a) The Monthly Rental provided for herein is based, in part, upon
Landlord's estimate of "Operating Costs," as hereinafter defined. The "Initial
Operating Costs" are stipulated to be the Operating Costs for the calendar year
1998 (the "Initial Calendar Year").

        (b) The term "Operating Costs" shall mean all operating expenses of the
Building and the "Building's Allocated Share" (hereinafter defined) of the
common areas of the Complex, all of which shall be computed on a modified cash
basis and which shall include all expenses, costs, and disbursements of every
kind and nature, which Landlord (i) shall pay; or (ii) become obligated to pay
in connection with the ownership, operation, management, maintenance, repair,
replacement and security of the Building, including, but not limited to, the
following:

               (i) Wages and salaries of all employees engaged in the operation
and maintenance of the Building, including, but not limited to, taxes, insurance
and benefits relating thereto;

               (ii) All supplies and materials used in the operation and
maintenance of the Building.

               (iii) Cost of water, sewage, electricity and other utilities
furnished in connection with the operation of the Building;

               (iv) Cost of all service agreements and maintenance for the
Building and/or the Property and/or the equipment therein, including, but not
limited to, trash removal, security services, alarm services, window cleaning,
janitorial service, HVAC maintenance, elevator maintenance, and grounds
maintenance;

               (v) Cost of all insurance relating to the Complex including, but
not limited to, the cost of casualty and liability insurance applicable to the
Complex and Landlord's personal property used in connection therewith;

               (vi) All taxes (ad valorem and otherwise), assessments, and
governmental charges whether federal, state, county, or municipal, and whether
by taxing districts or authorities presently taxing the Building or by others,
subsequently created or otherwise, and any other taxes (other than federal and
state income taxes) and assessments attributable to any portion of the Building
or its operation or any Rent or any personal property in connection with the
operation of the Building, and any reasonable consultants and legal fees
incurred with respect to issues, concerns or appeals involving the taxes or the
Building;

               (vii) Cost of repairs and general maintenance of the interior and
exterior of the Building (including, but not limited to, glass breakage).

                                       3
<PAGE>   27

               (viii) Cost of management fees for general operation and
management of the Building, which service may be provided by an affiliated
company or subsidiary of Landlord, provided that such management fee shall not
exceed the management fee paid for the management of comparable office buildings
in the area of the Property for comparable services negotiated at arms length;
and

               (ix) A reasonable amortization cost due to any capital
expenditures incurred (i) which are incurred to have the effect of reducing or
limiting Operating Costs of the Building, or improving the operating efficiency
of the Complex and the Property, if such reduction or limitation would inure to
Tenant's benefit, or (ii) which may be required by governmental authority or by
Landlord's insurance carrier, or (iii) which are designed to protect or enhance
the health, safety or welfare of the tenants in the Complex or their invitees.

               (x) Cost of repairs, replacements, damages in respect to the
Building incurred due to casualties or other causes to the extent uninsured
including any deductible amounts.

               (xi) Cost of auditing and maintaining accounting books and
records in respect to the Building.

               (xii) Cost of conducting any indoor air quality testing in any
portions of the Building deemed necessary or desirable by Landlord, including
regularly scheduled testing, and any costs incurred in connection with work
arising out of the results of such tests or reports or the recommendations in
such tests or reports.

               (xiii) The Building's Allocated Share of all costs and expenses
for the general operation, management, maintenance and repair of all common
areas of the Complex, including all such costs and expenses described in items
(i) through (xii) above in respect to the common areas of the Complex.

        Landlord shall be permitted to contract with its affiliates for
supplies, materials, and services used for the operation, maintenance, and
management of the Property and Complex and its affiliates shall be permitted to
subcontract for the acquisition of said supplies, materials, and services;
provided, however, Landlord's payments to any affiliates for such supplies,
services, and materials shall not exceed the costs normally charged by third
parties for such supplies, materials, and services.

        Notwithstanding any provision herein to the contrary, to the extent that
Landlord incurs any Operating Costs which are allocable to the Building but
shall not be directly and allocable only to the Building or other building in
the Complex, then Landlord shall allocate such Operating Cost to the Building
and the other buildings that such Operating Costs are allocable on a consistent
basis determined by Landlord.

        Expressly excluded from the definition of the term "Operating Costs"
are:

               (i) Replacement of capital investment items (excepting those
expenditures referred to above)

               (ii) Landlord's home office expense;

               (iii) Leasing commissions;

               (iv) Reimbursements paid by specific tenants or other third
parties for direct costs incurred at their request;

               (v) Depreciation;

               (vi) Principal, interest, and other costs directly related to
financing the Property;

               (vii) The cost of any repairs or general maintenance paid by the
proceeds of insurance policies carried by Landlord on the Property;

                                       4
<PAGE>   28

               (viii) The wages and salaries of any supervisory or management
employee of Landlord not involved in the day-to-day operation and maintenance of
the Complex.

        (c) The term "Tenant's Share" shall mean the portion that the Rentable
Square Feet in the Premises bears to the "Total Building Rentable Area" (as
hereinafter defined). Notwithstanding anything to the contrary contained herein,
in the event the Total Building Rentable Area does not have an average occupancy
of ninety-five percent (95%) during any calendar year, appropriate adjustments
shall be made to determine Operating Costs as though the Complex had been
ninety-five percent (95%) occupied, but in no event shall Tenant ever be
required to pay more than Tenant's Share of the determined Operating Costs. The
average occupancy shall be determined by adding together the total leased space
on the last day of each month during the calendar year in question and dividing
by twelve (12). For purposes of this Lease, the Total Building Rentable Area is
388,832 square feet (which is the square footage of all of the buildings in the
Complex) and the "Tenant's Share" equals 1.8%.

        (d) On or about January 31st of each calendar year after the Initial
Calendar Year (or as soon thereafter as practical) Landlord shall provide Tenant
with a comparison of the Initial Operating Costs and the projected Operating
Costs for such current calendar year, and Tenant shall thereafter pay, as
"Additional Rent", Tenant's Share of any excess of Landlord's projected
Operating Costs in such calendar year over the Initial Operating Costs. Such
projected increase in Operating Costs shall be payable in advance on a monthly
basis by paying one-twelfth (1/12th) of such projected increase during each
month of such respective calendar year. If Landlord has not furnished Tenant
such comparison by January 1 of a calendar year after the calendar year
immediately following the Initial Calendar Year, Tenant shall continue to pay on
the basis of the prior year's estimate until the month after such comparison is
given. Landlord shall, within a period of one hundred twenty (120) days (or as
soon thereafter as practical) after the close of each such respective calendar
year following the Initial Calendar Year provide Tenant an unaudited statement
of such year's actual Operating Costs compared to the Initial Operating Costs
(such unaudited statement shall be herein referred to as the "Final Annual
Statement of Operating Costs"). If the actual Operating Costs are greater than
the projected Operating Costs as shown on the Final Annual Statement of
Operating Costs, Tenant shall pay Landlord, within thirty (30) days of such
statement's receipt, Tenant's Share of the difference thereof. If such year's
projected Operating Costs are greater than the actual Operating Costs as shown
on the Final Annual Statement of Operating Costs, Landlord shall credit Tenant,
within thirty (30) days of such statement issuance, Tenant's Share of the
difference between the projected Operating Costs and the greater of actual
Operating Costs or Initial Operating Costs. In no event, however, shall Tenant
pay as Operating Costs an amount which is less than the Initial Operating Costs
for the Initial Calendar Year.

        (e) Anything herein to the contrary notwithstanding, in no event shall
the Monthly Rental as set forth in Paragraph 2(a) ever be reduced on account of
Operating Costs.

        (f) Should this Lease commence at any time other than the first day of a
calendar year, or terminate at any time other than the last day of a calendar
year, the amount of Additional Rent due from Tenant shall be proportionately
adjusted based on that portion of the year that this Lease was in effect.

        (g) (i) Tenant shall have the right for a period of thirty (30) days
after receipt of the Final Annual Statement of Operating Costs to review
Landlord's books and records with respect to actual annual Operating Costs for
the period covered by the Final Annual Statement of Operating Costs. Such review
shall take place in Landlord's manager's office in the Complex or at such other
place as designated by Landlord. Tenant shall give Landlord not less than ten
(10) days nor more than twenty (20) days written notice of the date on which
Tenant intends to conduct such review. In the event Tenant either fails to give
written notice or thereafter fails to complete such inspection within ten (10)
business days after the date for the inspection set forth in Tenant's written
notice, then Tenant's right to review Landlord's books and records shall
terminate on such 10th day and the Final Statement of Operating Costs in
question shall be binding on both Landlord and Tenant. The results of such
review shall be for the benefit of Landlord and Tenant only, shall be maintained
in confidence by Tenant, and shall not be disseminated or furnished to any other
person or entity. Tenant may use accountants or other professionals to aid
Tenant in conducting the audit, but Tenant may not use any auditing services or
consultants that are paid on a contingent fee basis or owned by, affiliated
with, employed by or related to any office building landlords or office building
management companies or services.

                                       5
<PAGE>   29

               (ii) If, as a result of Tenant's review, Tenant claims that any
particular items shall be incorrectly included as an Operating Costs under this
Lease or Tenant claims any mathematical errors exist in the Final Statement of
Operating Costs, Tenant may give written notice to Landlord within ten (10) days
after the thirty (30) day review period. Said notice may only contest Landlord's
Final Statement of Operating Costs for the two (2) reasons included in this
subparagraph (g) and said notice shall clearly reflect the reasons for the
disagreement and the amount claimed by Tenant as owed from Landlord. Tenant and
Landlord shall then meet in an effort to resolve the differences in their
respective findings.

               (iii) If a resolution is not reached within twenty (20) days of
Tenant's written notice, then Landlord shall designate an independent certified
public accountant to audit the actual annual Operating Expenses for the period
in question. The findings of said accountant shall be binding on both Landlord
and Tenant.

               (iv) To the extent that the accountant's determination of
Operating Expenses is less than ninety percent (90%) of the amount reflected on
Landlord's final statement, Landlord shall bear the cost of the audit.
Conversely, to the extent that the accountant's determination of the amount
reflected on Landlord's final statement is equal to or within ninety percent
(90%) of said statement, then Tenant shall bear the cost of the audit.

               (v) If as a result of such audit it is determined that the amount
of Additional Rent due from Tenant shall be less than that shown due on
Landlord's statement, Landlord shall make such adjustments as necessary to
correct such statement and Landlord shall refund to Tenant any over payments of
Additional Rent made by Tenant.

        (h) Tenant's payments of Additional Rent shall not be deemed payments of
base rental as that term is construed relative to governmental wage and price
controls or analogous governmental actions affecting the amount of rent which
Landlord may charge Tenant for the Premises.

4.      DELIVERY OF THE PREMISES

        (a) Landlord shall endeavor to deliver possession of the Premises to
Tenant, substantially complete on the Scheduled Commencement Date with the
improvements to be installed or constructed pursuant to the work agreement
attached as Exhibit "D" (the "Work Agreement"), which is incorporated herein and
made a part of this Lease. If Landlord, for any reason whatsoever, cannot
deliver possession of the Premises to Tenant, with the improvements to be
installed or constructed pursuant to the Work Agreement substantially complete,
on the Scheduled Commencement Date, this Lease shall not be void or voidable,
nor shall Landlord be liable to Tenant for any loss or damage resulting
therefrom. If the delay is due to any "Unavoidable Delays" (as defined in
Section 4 (a) of the Work Agreement) or to any reason other than "Tenant Delays"
(as defined in Section 4 (c) of the Work Agreement), the Commencement Date shall
be postponed until the date, and Rent shall be waived for the period between the
Scheduled Commencement Date and the date, which Landlord has advised Tenant is
the date that Landlord can deliver possession of the Premises to Tenant with the
improvements to be installed or constructed pursuant to the Work Agreement
substantially complete, and Tenant agrees that such waiver shall constitute a
full settlement of any and all claims Tenant might have against Landlord arising
out of Landlord's failure to tender possession on the Scheduled Commencement
Date. If the delay is due to any Tenant Delays, the Scheduled Commencement Date
shall not be postponed, and the Term and Tenant's obligation to pay Rent shall
commence as of the Scheduled Commencement Date plus any delays caused by
Unavoidable Delays, if any, and not Tenant Delays. If Landlord delivers
possession of the Premises prior to the Scheduled Commencement Date, the Term
and Tenant's obligation to pay Rent shall commence on the date of such delivery.

        (b) Upon delivery of possession of the Premises by Landlord in
accordance with the Work Letter, Tenant shall execute and deliver an agreement
confirming the Commencement Date and Expiration Date, and Tenant's acceptance of
the Premises, which agreement shall be in the form of Exhibit D, Schedule 2.

                                       6
<PAGE>   30

5.      ACCEPTANCE OF THE PREMISES

        The taking of possession of any portion of the Premises by Tenant shall
be conclusive evidence that Tenant has inspected the Premises and accepts the
same "as is" and that said portion of the Premises and the Complex are in good
and satisfactory condition for the use intended at the time such possession was
taken.

6.      USE

        Tenant shall use the Premises only for office purposes, generally in
accordance with the manner of use by other tenants in the Complex. The foregoing
notwithstanding, the Premises shall not be used for any of the purposes or uses
described in Exhibit "E"; any illegal purposes; nor in any manner to create any
nuisance or trespass; nor in any manner to vitiate the insurance or increase the
rate of insurance on the Premises. Tenant's use of the Premises shall not
violate any ordinance, law or regulation of any governmental body or the "Rules
and Regulations" of Landlord (the "Rules") as set forth in Exhibit "C" attached
hereto and made a part hereof, or cause an unreasonable amount of use of any of
the services provided in the Complex. Tenant agrees, at its own expense, to
promptly comply with any and all municipal, county, state and federal statutes,
regulations, or requirements applicable or in any way relating to the use and
occupancy of the Premises. Tenant agrees to conduct its business in the manner
and according to the generally accepted business principles of the business or
profession in which Tenant is engaged.

7.      CARE OF THE PREMISES

        (a)    LANDLORD'S REPAIRS

               (i) Tenant agrees that no representations respecting the Premises
or the Complex, or the condition thereof, and that no promises to decorate,
alter, repair or improve the Premises, either before or after the execution
hereof, have been made by Landlord or its agents to Tenant, unless the same are
contained in this Lease.

               (ii) Landlord shall maintain and repair only the common hallways
and corridors, common rest rooms, main lobby area, heating, ventilating and
air-conditioning systems, driveways and parking areas located on the Land, if
any, the roof, foundation, floors and exterior walls and glass of the Building.
Tenant shall immediately give Landlord written notice of any defect or need for
repairs, after which Landlord shall have a reasonable time within which to
repair same or cure such defect. Landlord's liability hereunder shall be limited
only to the cost of correcting such defects or making such repairs.
Notwithstanding Landlord's obligation to maintain and repair under this Section
7(a), Tenant shall reimburse Landlord for the repair of any damage caused by
Tenant, or Tenant's employees, agents, contractors, invitees or licensees, or
caused by Tenant's default hereunder.

               (iii) Notwithstanding any other provisions herein, Landlord shall
not be liable to Tenant for any damage occasioned by plumbing, electrical, gas,
water, steam or other utility pipes, systems or facilities or by the bursting,
stopping, leaking or running of any tank, sprinkler, washstand, water closet or
pipes in or about the Premises or the Building; nor for any damage occasioned by
water being upon or coming through or around the roof or any flashing, window,
skylight, vent, door, or the like unless directly resulting from Landlord's act
or willful neglect after reasonable notice; nor for any damage arising out of
any acts or neglect of co-tenants, other occupants of the Building, occupants of
adjacent property or the public.

        (b) TENANT'S REPAIRS. Tenant will, at its sole cost and expense,
maintain the Premises and the fixtures and appurtenances therein in good order,
condition and repair, and will neither commit nor suffer any active or
permissive waste or injury thereof. At all times, Tenant shall maintain the
Premises in accordance with all laws, rules and regulations governing its
occupancy of the Premises. Tenant's responsibilities in conjunction therewith
shall include, but not be limited to maintain the Premises in a first-class
condition and state of repair. All such repair work, maintenance and any
alterations permitted by Landlord (i) shall be done at Tenant's sole cost and
expense; (ii) shall be done by Landlord's employees or agents or, with
Landlord's express written consent, by persons requested by Tenant; and (iii)
shall first be consented to in writing by Landlord. Tenant shall, at Tenant's
expense, but under the direction of Landlord and performed by Landlord's
employees or agents, or with Landlord's express written consent, by persons
requested

                                       7
<PAGE>   31

by Tenant and consented to in writing by Landlord, promptly repair any injury or
damage to the Premises or Complex caused by the misuse or neglect thereof by
Tenant, by Tenant's contractors, subcontractors, customers, employees,
licensees, agents, or invitees permitted or invited (whether by express or
implied invitation) on the Premises by Tenant, or by Tenant moving in or out of
the Premises. In the event any repairs are required to be made in or to the
Premises as a result of the actions or inactions of Tenant, its agents,
contractors, servants, employees, subtenant, concessionaires, licensees,
invitees or guests, Tenant shall be responsible for payment of all such repairs,
which shall be made by Landlord or its contractors. If Tenant does not make
repairs promptly and adequately, Landlord may, but need not, make repairs, and
Tenant shall promptly pay the cost thereof as Rent in addition to the Base
Rental and Additional Rent. Tenant shall pay Landlord as Rent in addition to the
Base Rental and Additional Rent for overtime and for any other expense incurred
in the event repairs, alterations, decorating or other work in the Premises are
not made, at Tenant's request, during ordinary business hours. Upon expiration
or other termination of the Term, Tenant shall quit and surrender to Landlord
the Premises, broom clean, in good order and condition as provided in this
Lease, ordinary wear and tear excepted, and Tenant shall remove all of its
property.

        (c) ALTERATIONS. Tenant will not, without Landlord's prior written
consent, (which consent may be withheld for any reason whatsoever in Landlord's
sole and absolute discretion) make alterations, additions or improvements
(including, but not limited to, structural alterations, additions or
improvements) in or about the Premises and will not do anything to or on the
Premises which will increase the rate of fire or other insurance on the Complex
or the Property. If Landlord shall fail to notify Tenant in writing of such
election within said thirty (30) day period, Landlord shall be deemed to have
elected to deny such consent. All alterations, additions or improvements of a
permanent nature made or installed by Tenant to the Premises shall become the
property of Landlord at the expiration or earlier termination of this Lease.
Landlord reserves the right to require Tenant, at Tenant's sole cost and
expense, to remove any improvements or additions made to the Premises by Tenant
and to repair and restore the Premises to their condition prior to such
alteration, addition or improvement, reasonable wear and tear, unrepaired
casualty not caused by Tenant (or by Tenant's contractors, subcontractors,
customers, employees, licensees, agents or invitees permitted or invited
[whether by express or implied invitation]) and condemnation excepted, unless
Landlord has agreed in writing, at or prior to the time Tenant requests the
right to make such alteration, addition or improvement, that such item need not
be removed by Tenant at the expiration or earlier termination of the Term.
Landlord shall have the right to assess an administrative fee and a legal
processing fee to cover Landlord's review of materials for any proposed Tenant
alteration, addition or improvement.

        (d) CONDITION OF PREMISES ON SURRENDER OF PREMISES. Prior to the
Expiration Date or upon any earlier termination of this Lease, Tenant, at
Tenant's sole cost and expense, will remove all Tenant's personal property and
repair all injury done by or in connection with installation or removal of said
property and surrender the Premises (together with all keys, access cards or
entrance passes to the Premises or the Complex) in as good a condition as they
were when delivered to Tenant at the beginning of the Term, reasonable wear and
tear, insured casualty not caused by Tenant (by Tenant's contractors,
subcontractors, customers, employees, licensees, agents or invitees permitted or
invited [whether by express or implied invitation]) and condemnation excepted.
All property of Tenant remaining in the Premises after expiration of the Term or
earlier termination of this Lease shall be conclusively deemed to be abandoned,
shall thereupon at the election of Landlord, become the property of Landlord and
Landlord may remove and dispose of such property in any way Landlord sees fit
without liability to Tenant. Tenant shall reimburse Landlord for the cost of
removing and storing such abandoned property. The foregoing notwithstanding,
Landlord shall continue to have the right (which shall survive termination or
expiration of the Lease) to require Tenant to remove any improvements or
additions made to the Premises by Tenant pursuant to (b) above.

        (e) CONTRACTORS DOING WORK. In doing any work related to the
installation of Tenant's furnishings, fixtures, or equipment in the Premises,
Tenant will use only contractors or workers consented to by Landlord in writing
prior to the time such work is commenced. Landlord may condition its consent
upon its receipt from such contractors or workers of acceptable (i) lien
waivers; and (ii) evidence that such contractors have contractor's liability
insurance with at least $5,000,000 coverage; automobile liability insurance with
at least $1,000,000 coverage; and worker's compensation insurance in the
statutory amounts required by the State of Georgia which coverage shall be
obtained from carriers satisfactory to Landlord. Landlord shall have the right
to

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<PAGE>   32

periodically review and modify the coverages required hereunder. Landlord and
Landlord's property manager shall be named additional insureds on the policies
required hereunder. Tenant shall within ten (10) days of filing promptly remove
any lien or claim of lien for material or labor claimed against the Premises,
the Building or Complex, or both, by such contractors or workers if such claim
should arise, and Tenant shall and does hereby indemnify and hold harmless
Landlord from and against any and all claims, loss, cost, damage, expense or
liabilities including, but not limited to, reasonable attorney's fees, incurred
by Landlord, as a result of or in any way related to such claims or such liens.

        (f) PERSONAL PROPERTY AT RISK. All personal property brought into the
Premises by Tenant, its employees, licensees and invitees shall be at the sole
risk of Tenant. Landlord shall not be liable for theft thereof or of money
deposited therein or for any damages thereto, such theft or damage being the
sole responsibility of Tenant.

        (g) LANDLORD'S RIGHT TO DO WORK. Landlord shall also have the right, at
any time, without the same constituting an actual or constructive eviction and
without incurring any liability to Tenant therefor, to reasonably change the
arrangement and/or location of entrances or passageways, doors and doorways,
corridors, elevators, toilets or other public parts of the Property, and to
reasonably close entrances, doors, corridors, elevators or other facilities.

8.      SERVICES

        Provided Tenant is in compliance with the terms and conditions of this
Lease, Landlord shall furnish the services described in Exhibit "G", attached
hereto and by reference made a part hereof (certain costs of which services
shall be reimbursed to Landlord in accordance with Section 3 herein). Landlord
will provide to Tenant heating or air conditioning service after the Complex
operating hours (defined in "Exhibit "G" provided Tenant gives Landlord notice
of the desire for such service by 4:00 p.m. on the business day on which Tenant
desires the service, and by 4:00 p.m. on the Thursday prior to any Saturday,
Sunday or holiday on which Tenant desires such service. Such service will be
provided by Landlord at such rates as shall be established by Landlord from time
to time. As of the date of this Lease, such rates are $40.00 per floor per hour,
provided such rates are subject to increase in connection with increases costs
of administrative services, labor, equipment and utilities.

9.      DESTRUCTION OR DAMAGE TO PREMISES

        (a) If the Premises, the Building or the Complex or any building in the
Complex or the parking in the Complex are totally destroyed (or so substantially
damaged as to be wholly untenantable or not usable or not repairable within one
hundred eighty (180) days in the determination of Landlord's architect or
engineer) by storm, fire, earthquake or other casualty, Landlord shall have the
option to:

               (i) Terminate this Lease as of the date of the occurrence of the
storm, earthquake, fire or other casualty by giving written notice to Tenant
within ninety (90) days from the date of such damage or destruction; or

               (ii) Commence the process of restoration of the Premises to a
tenantable condition within thirty (30) days from the date of receipt by
Landlord of all of the insurance proceeds paid with respect to such casualty,
and proceed with due diligence to complete said restoration of the Premises.
Provided, however, that Landlord shall not be obligated to expend for such
repair an amount in excess of the net insurance proceeds actually received as a
result of such damage and in no event shall Landlord be required to repair or
replace any alteration or improvement made by or for Tenant, including but not
limited to Tenant's Work (as defined in the Work Agreement), nor any trade
fixtures, furniture, equipment or other property belonging to the Tenant. If
Landlord chooses to restore the Premises, Rent shall abate with respect to the
untenantable portion of the Premises from the date of such casualty until the
date of substantial restoration thereof.

        If Landlord shall not elect to terminate this Lease, the Landlord shall
complete such restoration with reasonable diligence within one hundred eighty
(180) days of the date of receipt by Landlord of all of the insurance proceeds
paid with respect to such casualty, as described above subject Tenant Delays.
During such period of repair, if any portion of the Premises shall be

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<PAGE>   33

untenantable as a result of casualty, Base Rental and Additional Rent shall
abate beginning with the date of such casualty and ending on the date the
Premises are rendered tenantable by an amount bearing the same ratio to the
total amount of Base Rental and Additional Rent due under this Lease as the
untenantable portion of the Premises bears to the entire Premises.
Notwithstanding such abatement, Tenant shall remain obligated to perform and
discharge all of its remaining covenants under this Lease during the period of
abatement.

        (b) If such damage or destruction occurs within one (1) year of the
expiration of the Term, either party may, at its option on written notice to the
other party within thirty (30) days of such destruction or damage, terminate
this Lease as of the date of such destruction or damage.

        (c) Rent shall not abate if the damage or destruction of the Premises,
whether total or partial, is the result of the negligence of Tenant, its
contractors, subcontractors, agents, employees, guests or invitees.

10.     DEFAULT BY TENANT; LANDLORD'S REMEDIES

        (a) The occurrence of any of the following shall constitute an event of
default hereunder by Tenant:

               (i) The Rent or any other sum of money due of Tenant hereunder is
not paid within five (5) days of the date when Tenant receives written notice
thereof from Landlord; provided however, that Landlord shall not be required to
give any such notice of nonpayment more than two (2) times in any 12-month
period; and for the third (3rd) and any subsequent nonpayment; it shall be an
event of default if payment is not received within five (5) days or when due;

               (ii) The Premises are deserted or vacated, and Tenant does not
occupy the Premises within ten (10) days after notice from Landlord to Tenant;

               (iii) Tenant fails to bond off or otherwise remove (in a manner
acceptable to Landlord) any lien filed against the Premises or the Complex by
reason of Tenant's actions, within ten (10) days after Tenant has notice of the
filing of such lien;

               (iv) Tenant fails to observe, perform and keep any of the other
covenants, agreements, provisions, stipulations, conditions and Rules herein
contained to be observed, performed and kept by Tenant and persists in such
failure after ten (10) days written notice by Landlord requiring that Tenant
remedy, correct, desist or comply (or if any such failure to comply on the part
of Tenant would reasonably require more than ten (10) days to cure, unless
Tenant commences curing within the ten (10) day notice period and thereafter
promptly, effectively and continuously proceeds with the curing of the failure
to comply on the part of Tenant and, in all such events, cures such failure to
comply on the part of Tenant no later than forty-five (45) days after such
notice).

        (b) Upon the occurrence of an event of default, Landlord shall have the
option to do and perform any one or more of the following:

               (i) Terminate this Lease, in which event Tenant shall immediately
surrender the Premises to Landlord. If Tenant shall fail to do so, Landlord may,
without further notice and without prejudice to any other remedy Landlord may
have, enter upon the Premises without the requirement of resorting to the
dispossessory procedures set forth by applicable law, if any, and expel or
remove Tenant and Tenant's effects without being liable for any claim for
trespass or damages therefor. Upon any such termination, Tenant shall remain
liable to Landlord for damages, due and payable monthly on the day Rent would
have been payable hereunder, in an amount equal to the Rent and any other
amounts which would have been owing by Tenant for the balance of the Term, had
this Lease not been terminated, less the net proceeds, if any, of any reletting
of the Premises by Landlord, plus the aggregate amount of all of Landlord's
costs and expenses (including, without limitation, advertising expenses and
professional fees) incurred in connection with or in any way related to the
termination of this Lease, eviction of Tenant and such reletting; or

               (ii) Enter the Premises as the agent of Tenant without the
requirement of resorting to the dispossessory procedures set forth in
O.C.G.A. Section 44-7-50 et. seq., and without being liable for any claim for
trespass or damages therefor, and, in connection therewith, re-key the Premises,
remove Tenant's effects therefrom and store the same at Tenant's expense,
without being liable for any damage thereto, and relet the Premises as the agent
of Tenant, without advertisement, by private negotiations, for any term Landlord
deems proper, and receive the rent therefor. Upon

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<PAGE>   34

such reletting, all rentals received by the Landlord from such re-letting shall
be applied first, to the payment of any indebtedness other than the Rent due
hereunder from Tenant to Landlord; secondly, to the payment of any costs and
expenses of such reletting, including, without limitation, brokerage fees and
attorneys' fees and the costs of such alterations and repairs as may be
necessary relative to such re-letting; third, to the payment of the Rents then
due and unpaid under the Lease; and the residue, if any, shall be held by the
Landlord and applied in payment of future Rents as same may become due and
payable hereunder. Tenant shall pay Landlord on demand any deficiency that may
arise by reason of such reletting, but Tenant shall not be entitled to any
surplus so arising. Tenant shall reimburse Landlord for all costs and expenses
(including, without limitation, advertising expenses and professional fees)
incurred in connection with or in any way related to the eviction of Tenant and
reletting the Premises, and for the amount of any other Rent which would have
been due of Tenant to Landlord hereunder if not for certain concessions granted
by Landlord to Tenant. Notwithstanding any such re-letting without termination,
Landlord may at any time thereafter elect to terminate this Lease for such
previous breach; or

               (iii) Landlord, in addition to but not in lieu of or in
limitation of any other right or remedy provided to Landlord under the terms of
this Lease or otherwise (but only to the extent such sum is not reimbursed to
Landlord in conjunction with any other payment made by Tenant to Landlord),
shall have the right to be immediately repaid by Tenant the amount of all sums
expended by Landlord and not repaid by Tenant in connection with preparing or
improving the Premises to Tenant's specifications and any and all costs and
expenses incurred in renovating or altering the Premises to make it suitable
for reletting; or

               (iv) As agent of Tenant, do whatever Tenant is obligated to do by
the provisions of this Lease, including, but not limited to, entering the
Premises, without being liable to prosecution or any claims for damages, in
order to accomplish this purpose. Tenant agrees to reimburse Landlord
immediately upon demand for any expenses which Landlord may incur in thus
effecting compliance with this Lease on behalf of Tenant, and Tenant further
agrees that Landlord shall not be liable for any damages resulting to Tenant
from such action, whether caused by the negligence of Landlord or otherwise.

               (v) Landlord may declare the entire amount of Base Rental,
Additional Rent and other sums which would have become due and payable during
the remainder of the Term of this Lease to be due and payable immediately
without notice to Tenant, and thereafter Landlord may terminate this Lease and
recover from Tenant, as full liquidated damages, all damages Landlord may incur
by reason of Tenant's default, which damages shall be limited to (a) the amounts
due and owing prior to such termination, plus (b) the cost of recovering the
Premises, plus (c) reasonable attorney's fees and costs, plus (d) a sum which,
at the date of such termination, equals the present value [discounted at ten
percent (10%) per annum] of (i) the Base Rental, Additional Rent and all other
sums which would have been due and payable by Tenant hereunder for the remainder
of the Term (including any Extended Term, if the Term of the Lease has been
extended) less (ii) the aggregate reasonable rental value of the Premises for
the same period, accounting for the cost, time and other factors necessary to
relet the Premises, all of which amounts shall be immediately due and payable;
provided, however, if Landlord elects to pursue this remedy, Landlord shall do
so exclusively and shall not thereafter pursue any of the other remedies set
forth in section 10(b)(i)(iv) to collect Base Rental and Additional Rent due
from Tenant. The foregoing limitation of remedies is without prejudice to
Landlord's right to enforce Tenant's indemnity obligation with respect to
claims, damages and liabilities (other than Base Rental and Additional Rent)
resulting to Landlord by or through Tenant's use and occupancy of the Premises.
Landlord and Tenant agree that such amounts constitute a good faith reasonable
estimate of the damages which might be suffered by Landlord upon the occurrence
of a Default and that it as impossible to estimate more precisely such damages.
Landlord's receipt of the aforesaid amount is intended not as a penalty but as
full liquidated damages.

        (c) Pursuit by Landlord of any of the foregoing remedies shall not
preclude the pursuit of general or special damages incurred, or of any of the
other remedies provided herein, at law or in equity; provided, however,
Landlord's election to pursue the remedy in Section 10(b)(v) shall be
exclusive of any other remedies available to Landlord except as provided in said
Section 10(b)(v).

        (d) No act or thing done by Landlord or Landlord's employees or agents
during the Term shall be deemed an acceptance of a surrender of the Premises.
Neither the mention in this Lease of any particular remedy, nor the exercise by
Landlord of any particular remedy hereunder, at

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<PAGE>   35

law or in equity, shall preclude Landlord from any other remedy Landlord might
have under this Lease, at law or in equity. Any waiver of or redress of or any
violation of any covenant or condition contained in this Lease or any of the
Rules now or hereafter adopted by Landlord, shall not prevent a subsequent act,
which would have originally constituted a violation, from having all the force
and effect of an original violation. The receipt by Landlord of Rent with
knowledge of the breach of any covenant in this Lease shall not be deemed a
waiver of such breach.

        (e) Landlord's reentry, demand for possession, notice that the tenancy
hereby created will be terminated on the date therein named, institution of an
action of unlawful detainer or ejectment or the entering of a judgment for
possession in such action or any other act or acts resulting in the termination
of Tenant's right to possession of the Premises shall not relieve Tenant from
Tenant's obligation to pay all sums due hereunder during the balance of the
Term, except as herein expressly provided. Landlord may collect and receive any
Base Rental, Additional Rent, or charges due from Tenant, and the payment
thereof shall not constitute a waiver of or affect any notice or demand given,
suit instituted or judgment obtained by Landlord, or be held to waive, affect,
change, modify or alter the rights or remedies which Landlord has in equity or
at law by virtue of this Lease.

        (f) The Base Rental is calculated for the Term of this Lease and a
substantial portion of the Base Rental includes reimbursement to Landlord of
direct out-of-pocket investment costs and expenses with respect to leasing the
Premises to Tenant that Landlord has incurred or will incur during the Term for
tenant improvements, leasing commissions and other costs, various tenant
concessions, and other similar direct costs and expenses relating to Landlord's
investment in the Premises, the aggregate amount of which Landlord has spread
over the entire Term. Tenant acknowledges that Landlord will suffer damages,
including, but not limited to, such unreimbursed direct out-of-pocket costs and
expenses unless Tenant pays to Landlord all the Base Rental due to Landlord for
the entire Term.

        (g) In the event Landlord commences any proceedings for nonpayment of
Base Rental, Additional Rent or other sums due hereunder, Tenant will not
interpose any counterclaim of whatever nature or description which is not
directly related to the Lease in any such proceeding. This shall not, however,
be construed as a waiver of Tenant's right to assert such claims in any separate
action or actions brought by Tenant.

        (h) Except as expressly provided in this Lease, Tenant hereby waives any
and every form of demand and notice prescribed by statute or other law,
including without limitation the notice of any election of remedies made by
Landlord under this Section, demand for payment of any rent, or demand for
possession.

        (i) All rights and remedies of Landlord created or otherwise existing at
law or in equity are cumulative and the exercise of one or more rights or
remedies shall not be taken to exclude or waive the right to exercise any other.

        (j) Tenant shall and hereby agrees to pay all costs and expenses
incurred by Landlord, including, but not limited to, reasonable attorneys' fees
in enforcing any of the covenants and agreements of this Lease or as a result of
any action brought by Landlord against Tenant for an unlawful detainer of the
Premises, and all such costs, expenses and attorneys' fees shall be paid by
Tenant to Landlord within ten (10) days after Landlord's written demand
therefor.

        (k) Notwithstanding anything in this Lease to the contrary, Tenant shall
have no claim, and hereby waives the right to any claim, against Landlord for
money damages by reason of any refusal, withholding or delaying by Landlord of
any consent, approval or statement of satisfaction, and in such event, Tenant's
only remedies therefor shall be an action for specific performance or injunction
to enforce any such requirements. If the result of any such action or
arbitration shall be adverse to Landlord, Landlord shall be liable to Tenant for
Tenant's reasonable expenses and attorney's fees thereby incurred.

11.     ASSIGNMENT AND SUBLETTING

        (a) Tenant shall not sublet any part of the Premises, nor assign this
Lease or any interest herein, without the prior written consent of Landlord. Any
sublease or assignment made without Landlord's consent shall be void. Landlord
shall be entitled to deny consent to an assignment or

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<PAGE>   36

sublease for any reason or no reason. For illustration only, without limiting in
any respect the reasons Landlord may withhold its consent, the following are
examples of reasons Landlord may withhold its consent: (i) the proposed
subtenant or assignee may, in Landlord's judgment unreasonably burden the
Complex, its amenities or services (ii) if the rate of compensation, including,
but not limited to, all rent requested by Tenant for the portion of the Premises
to be subleased or subject to an assignment of the Lease, impacts upon or
impairs Landlord's ability to rent space in the Complex at the then market rate
as offered by Landlord, (iii) the financial statements or the business
experience of the proposed assignee or sublessee are unsatisfactory to Landlord,
(iv) the proposed use of the Premises conflicts with other uses within the
Complex, (v) the prospective assignee or sublessee is an existing tenant of the
Complex and in Landlord's judgment such sublease or assignment may affect
Landlord's lease relationship with such tenant, or (vi) Tenant's proposed
subletting or assignment will in Landlord's judgment compete with landlord's
ability to lease other vacant space in the Complex. Consent by Landlord to one
assignment or sublease shall not destroy or waive this provision, and all later
assignments and subleases shall likewise be made only upon prior written consent
of Landlord. If a sublease or assignment is consented to by Landlord, any
sublessees or assignees shall become liable directly to Landlord for all
obligations of Tenant hereunder without relieving or in any way modifying
Tenant's liability hereunder.

        If Tenant desires to assign this Lease or sublet the Premises or any
part thereof, Tenant shall give Landlord written notice at least sixty (60) days
in advance of the date on which Tenant desires to make such assignment or
sublease, which notice shall specify: (a) the name and business of the proposed
assignee or sublessee; (b) the amount and location of the space in the Premises
affected; (c) the proposed effective date of the subletting or assignment; and
(d) the proposed rental to be paid to Tenant by such sublessee or assignee.

        If Tenant shall give such notice, Tenant shall pay on demand Landlord's
reasonable costs, including attorneys' fees incurred to consider and as
necessary to document such transaction. If Tenant notifies Landlord of Tenant's
intent to sublease or assign this Lease, Landlord shall within thirty (30) days
from receipt of such notice (a) consent to such proposed assignment or
subletting; (b) deny such consent (if Landlord shall fail to notify Tenant in
writing of such election within said thirty (30) day period, Landlord shall be
deemed to have elected to deny such consent); or (c) elect to cancel this Lease,
or to reduce the Premises by the area requested to be subleased or assigned if
the area is less than the entire Premises.

        If Landlord's election is to cancel or to reduce the area of the
Premises as provided in the foregoing clause (c) (such election being referred
to herein as "Landlord's Modification Election"), Tenant shall have ten (10)
days from receipt of Landlord's Modification Election to notify Landlord of
Tenant's acceptance of such cancellation or reduction or Tenant's desire to
remain in possession of the Premises under this Lease for the remainder of the
Term. If Tenant fails to notify Landlord of Tenant's election to accept
termination or reduction or to continue as Tenant hereunder, such failure shall
be deemed an election to terminate or have the area of the Premises reduced, as
the case may be, in accordance with Landlord's Modification Election and such
termination or reduction shall be effective at the end of the ten (10) day
period provided for above. If Landlord gives its consent to any such assignment
or sublease, any rent or other cost to the assignee or subtenant for all or any
portion of the Premises over and above the Rent payable by Tenant for such space
shall be due and payable, and shall be paid, to Landlord.

        If this Lease is cancelled, the area of the Premises is reduced or a
sublease or assignment is made as herein provided, Tenant shall pay Landlord a
charge equal to the actual costs incurred by Landlord, in Landlord's reasonable
judgment (including, but not limited to, the use and time of Landlord's
personnel), for all of the necessary legal, management, leasing or accounting
services required to accomplish such cancellation, reduction of area of the
Premises, assignment or subletting, as the case may be.

        Any physical alterations necessary with respect to any such assignment,
subletting or reduction of the area of the Premises shall be subject to the
provisions of this Lease regarding alterations and shall be at Tenant's sole
cost and expense and subject to applicable building codes. No acceptance by
Landlord of any rent or any other sum of money from any assignee, sublessee, or
other category of transferee shall release Tenant from any of its obligations
under this Lease or be deemed to constitute Landlord's consent to such
assignment, sublease or transfer.

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<PAGE>   37

        (b) The sale or transfer of Tenant's voting stock (if a corporation) or
a partnership interest (if a partnership) or member interest (if a limited
liability company) in Tenant resulting in the transfer of control of a majority
of such stock or interest, or the occupancy of the Premises by any successor
firm of Tenant or by any firm into which or with which Tenant may become merged
or consolidated shall be deemed an assignment of this Lease requiring the prior
written consent of Landlord.

        (c) The joint and several liability of Tenant named herein and any
immediate and remote successor in interest of Tenant (by assignment or
otherwise), and the due performance of the obligations of this Lease on Tenant's
part to be performed or observed, shall not in any way be discharged, released
or impaired by any (i) agreement which modifies any of the rights or obligations
of the parties under this Lease, (ii) stipulation which extends the time within
which an obligation under this Lease is to be performed, (iii) waiver of the
performance of an obligation required under this Lease, or (iv) failure to
enforce any of the obligations set forth in this Lease; provided, however, that
(a) in the case of any modification of this Lease made after the date of an
assignment or other transfer of this Lease by Tenant, if such modification
increases or enlarges the obligations of Tenant or reduces the rights of Tenant,
then Tenant named herein and each respective assignor or transferor shall not be
liable under or bound by any such increase, enlargement or reduction; and (b) in
the case of any waiver by Landlord of a specific obligation of an assignee or
transferee of Tenant, such waiver shall also be deemed a waiver of such
obligation with respect to the immediate and remote assignors or transferors of
such assignee or transferee.

        (d) Tenant shall have no right whatsoever to encumber any of the
Tenant's rights, title or interest under this Lease, without the prior written
consent of the Landlord.

        (e) Nothing in this Lease shall in any way restrict Landlord's right to
assign or encumber this Lease in its sole and absolute discretion. Should the
Landlord assign this Lease as provided for above, or should Landlord encumber
all or any portion of the Complex and should the holder of such encumbrance
succeed to the interest of Landlord, Tenant shall be bound to said assignee or
any such holder under all the terms, covenants and conditions of this Lease for
the balance of the Lease term remaining after such succession and Tenant shall
attorn to such succeeding party as its Landlord under this Lease promptly under
any such succession. Tenant agrees that should any party so succeeding to the
interest of Landlord require a separate agreement of attornment regarding the
matters covered by this Lease, then Tenant shall enter into such attornment
agreement, provided the same does not substantially modify any of the provisions
of this Lease and has no material adverse effect upon Tenant's continued
occupancy of the Premises.

12.     CONDEMNATION

        (a) If all or a part of the Premises is taken by virtue of eminent
domain or other similar proceeding, or are conveyed in lieu of such taking, this
Lease shall expire on the date when title or right of possession shall vest, and
any Rent paid for any period beyond said date shall be repaid to Tenant. If all
or a part of the Complex other than the Premises is taken by virtue of eminent
domain or other similar proceeding, or is conveyed in lieu of such taking
rendering the remaining part of the Complex not subject to such condemnation
shall be substantially and adversely affected thereby, then Landlord, in its
sole discretion may terminate this Lease. If there is a partial taking where
this Lease is not terminated, the Rent shall be adjusted in proportion to the
Rentable Square Footage of the Premises taken, as determined by the Landlord's
architect or engineer. In any event, Landlord shall be entitled to, and Tenant
shall not have any right to claim, any award made in any condemnation
proceeding, action or ruling relating to the Complex or the Land; provided
however, in the event of a termination of this Lease Tenant shall be entitled to
make a separate claim in any condemnation proceeding, action or ruling relating
to the Complex for Tenant's moving expenses, loss of goodwill and the
unamortized value of leasehold improvements in the Premises actually paid for by
Tenant without contribution by Landlord, to the extent such claim does not in
any manner impact upon or reduce Landlord's claim or award in such eminent
domain proceeding, action or ruling and Tenant shall likewise have no claim
against Landlord for the value of any unexpired portion of this Lease.

        (b) Landlord shall have, in Landlord's sole discretion, the option of
terminating this Lease if any such condemnation, action or ruling or conveyance
in lieu thereof makes continuation of Landlord's use of the Complex economically
unfeasible, and Landlord shall be entitled to the

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<PAGE>   38

entire award as above provided, and in such case, Tenant shall likewise have no
claim against Landlord for the value of any unexpired portion of this Lease.

13. INSPECTIONS

        Landlord, its agents, employees, contractors and subcontractors, may
enter the Premises at reasonable hours to (a) exhibit the Premises to
prospective purchasers or tenants of the Premises or the Complex; (b) inspect
the Premises to see that Tenant is complying with its obligations hereunder; and
(c) make repairs or alterations (i) required of Landlord under the terms hereof;
(ii) to any adjoining space in the Complex; or (iii) to any systems serving the
Complex which run through the Premises; and (d) to perform any and all of
Landlord's obligations under this Lease, or any other lease, where entry to such
Premises is reasonably required for such performance. In addition to the
foregoing, Landlord, its agents, employees, contractors and/or sub-contractors
may enter the Premises at any time if an emergency requires such entry. Any such
entry shall not constitute an eviction of Tenant or be deemed as disturbing
Tenant's quiet enjoyment of the Premises and no abatement of rent shall result
because of such entry and/or performance. Landlord shall be allowed to take all
material into and upon Premises that may be required therefor without the same
constituting an eviction of Tenant in whole or in part; and the Base Rental and
Additional Rent reserved shall in no way abate while said decorations, repairs,
alterations, improvements or additions are being made. If Tenant shall not be
personally present to open and permit an entry into the Premises, at any time,
when for any reason an entry therein shall be necessary or permissible, Landlord
or Landlord's agents may enter the same by a pass key, or when for any reason an
entry therein shall be necessary and entry by pass key is not possible, may
forcibly enter the same, without rendering Landlord or such agents liable
therefor (if during such entry Landlord or such agents shall accord reasonable
care to Tenant's property), and without in any manner affecting the obligations
and covenants of this Lease. All entries shall, where possible, be performed at
such times and in such fashion so as not to unreasonably interfere with the
conduct and operation of Tenant's business. Nothing herein contained, however,
shall be deemed or construed to impose upon Landlord any obligation,
responsibility or liability whatsoever, for the care, supervision or repair of
the Premises or Complex other than as herein provided.

14. SUBORDINATION

        (a) This Lease shall be subject and subordinate to any underlying land
leases or deeds to secure debt which may now or hereafter affect this Lease, the
Complex or the Property and also to all renewals, modifications, extensions,
consolidations, and replacements of such underlying land leases and such deeds
to secure debt. In confirmation of the subordination set forth in this Section
14, Tenant shall, at Landlord's request, execute and deliver such further
instruments as may be desired by the holder(s) of the deed(s) to secure debt (a
"Mortgagee") or by any lessor under any such underlying land leases.
Notwithstanding the foregoing, Landlord or such Mortgagee shall have the right
to subordinate or cause to be subordinated, in whole or in part, any such
underlying land leases or deed(s) to secure debt to this Lease (but not in
respect to priority of entitlement of insurance or condemnation proceeds). If
any such underlying land leases or deed(s) to secure debt terminates for any
reason or any such deed(s) to secure debt is foreclosed or a conveyance in lieu
of foreclosure is made for any reason, Tenant shall, notwithstanding any
subordination, deliver to Mortgagee or the Landlord within ten (10) days of
written request an attornment agreement, providing that such Tenant shall
continue to abide by and comply with the terms and conditions of this Lease.

        (b) If any proceedings are brought for the foreclosure of, or in the
event of exercise of the power of sale or conveyance in lieu of foreclosure
under any deed to secure debt, Tenant shall at the option of the purchaser at
such foreclosure or other sale, attorn to such purchaser and recognize such
person as Landlord under this Lease. Tenant agrees that the institution of any
suit, action or other proceeding by a Mortgagee or a sale of the Property
pursuant to the powers granted to a Mortgagee under its deed to secure debt,
shall not, by operation of law or otherwise, result in the cancellation or the
termination of this Lease or of the obligations of the Tenant hereunder.

        (c) If such purchaser requests and accepts such attornment, from and
after the time of such attornment, Tenant shall have the same remedies against
such purchaser for the breach of an agreement contained in this Lease that
Tenant might have had against Landlord if the deed to secure debt had not been
terminated or foreclosed, except that such purchaser shall not be (i) liable for
any act or omission of the prior Landlord; (ii) subject to any offsets or
defenses which Tenant

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<PAGE>   39

might have against the prior Landlord; (iii) bound by any Rent or security
deposit which Tenant might have paid in advance to the prior Landlord; (iv)
obligated to cure any default of any prior Landlord under the Lease that
occurred prior to the time that such purchaser succeeded to the interest of
Landlord in the Property; or (v) bound by any amendment or modification of the
Lease made without the prior written consent of such purchaser.

        (d) As used in this Section 14, the term "deed(s) to secure debt" shall
also include mortgage(s) and deed(s) of trust.

15. INDEMNIFICATION AND HOLD HARMLESS

        (a) Tenant hereby indemnifies and holds harmless Landlord from and
against any injury, expense, damage, liability or claim, imposed on Landlord by
any person whomsoever, whether due to damage to the Premises, claims for
injuries to the person or property of any other tenant of the Complex or of any
other person in or about the Complex or the Property for any purpose whatsoever,
or administrative or criminal action by a governmental authority, if such
injury, expense, damage, liability or claim results either directly or
indirectly from the act, omission, negligence, misconduct or breach of any
provisions of this Lease by Tenant, the agents, servants, or employees of
Tenant, or any other person entering in the Complex or upon the Premises under
express or implied invitation or consent of Tenant. Tenant further agrees to
reimburse Landlord for any costs or expenses, including, but not limited to,
court costs and reasonable attorney's fees, which Landlord may incur in
investigating, handling or litigating any such claim or any action by a
governmental authority.

        (b) Tenant shall report in writing to Landlord any defective condition
in or about the Premises known to Tenant, and further agrees to attempt to
contact Landlord immediately in such instance.

16. TENANT'S INSURANCE

        (a) Tenant shall carry (at its sole expense during the Term): (i) fire
and extended coverage insurance insuring Tenant's improvements to the Premises
and any and all furniture, equipment, supplies, contents and other property
owned, leased, held or possessed by Tenant and contained therein, such insurance
coverage to be equal to the full replacement value of such improvements and
property, as such may increase from time to time; (ii) worker's compensation
insurance required by the State of Georgia; and (iii) commercial general
liability coverage on an occurrence basis for injury to or death of a person or
persons and for damage to property occasioned by or arising out of the
condition, use, or occupancy of the Premises, or other portions of the Complex,
including contractual liability and such other coverages and endorsements as are
reasonably required by Landlord, such policy to have a combined single limit of
not less than Three Million and No/100 Dollars ($3,000,000) for any bodily
injury or property damage occurring as a result of or in connection with the
above. Landlord and Landlord's property manager, asset manager, and their
respective partners, officers, shareholders, policyholders, employees, attorneys
and agents, and employees shall be named additional insureds on the policies
required hereunder and such policies shall provide that the coverage thereunder
is primary to, and not contributing with, any policy carried by any such
additional insured.

        (b) Tenant shall have included in all policies of insurance respectively
obtained by it with respect to the Complex or Premises a waiver by the insurer
of all right of subrogation against Landlord in connection with any loss or
damage thereby insured against, and Landlord shall have included in all property
insurance policies required to be maintained by Landlord under this Lease a
waiver by the insurer of all right of subrogation against Tenant in connection
with any loss or damage thereby insured against. To the full extent permitted by
law, Landlord as to its property insurance policies and Tenant as to all its
policies, each waives all right of recovery against the other for, and agrees to
release the other from liability for, loss or damage to the extent such loss or
damage results from a cause covered by valid and collectible insurance in effect
at the time of such loss or damage; provided however, that the foregoing release
by each party is conditioned upon the other party's carrying insurance with the
above described waiver of subrogation to the extent required above, and if such
coverage is not obtained or maintained by either party, then the other party's
foregoing release shall be deemed to be rescinded until such waiver is either
obtained or reinstated.

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<PAGE>   40

        (c) All said insurance policies shall be carried with companies licensed
to do business in the State of Georgia reasonably satisfactory to Landlord
having a Best's Rating of A XII or better and shall be noncancellable and
nonamendable except after thirty (30) days' written notice to Landlord. At
Landlord's request, duly executed certificates of such insurance shall be
delivered to Landlord prior to the Commencement Date and at least thirty (30)
days prior to the expiration of each respective policy term. Landlord shall have
the right to periodically review the coverages required hereunder and if
Landlord deems it reasonably necessary to require additional coverage resulting
from inflation or from increases in jury verdicts or other economic conditions
in the jurisdiction where the Property is located, Tenant shall obtain the
coverage requested by Landlord.

17. REMEDIES CUMULATIVE

        The rights given to Landlord and Tenant herein are in addition to any
rights that may be given to Landlord or Tenant by any statute or under law. The
utilization by a party of any remedy shall not be deemed an election of
remedies, so as to preclude said party from utilizing other remedies at the same
time.

18. ENTIRE AGREEMENT - NO WAIVER

        (a) This Lease contains the entire agreement of the parties hereto and
no representations, inducements, promises or agreements, oral or otherwise,
between the parties not embodied herein shall be of any force and effect. The
failure of either party to insist in any instance on strict performance of any
covenant or condition hereof, or to exercise any option herein contained, shall
not be construed as a waiver of such covenant, condition or option in any other
instance. This Lease (except for changes to "Rules" (as defined below) pursuant
to Section 28 hereof) cannot be changed or terminated orally, and can be
modified only in writing, executed by each party hereto. Tenant acknowledges and
agrees that Tenant has not relied upon any statement, representation, prior
written promises, or prior oral promises, agreements or warranties, except such
as are expressed herein.

        (b) Failure of Landlord to declare any default immediately upon
occurrence thereof, or delay in taking any action in connection therewith, shall
not waive such default, but Landlord shall have the right to declare any such
default at any time and take such action as might be lawful or authorized
hereunder, in law or in equity. No waiver by Landlord of a default by Tenant
shall be implied, and no express waiver by Landlord shall affect any default
other than the default specified in such waiver, and that only for the time and
extension therein stated.

19. HOLDING OVER

        If Tenant remains in possession of the Premises after expiration of the
Term, or after any permitted termination of the Lease by Landlord, with
Landlord's acquiescence and without any written agreement between the parties,
Tenant shall be a tenant at sufferance and such tenancy shall be subject to all
the provisions hereof, except that the Monthly Rental for said holdover period
shall be double the amount of Rent due in the last month of the Term. Nothing
herein shall be deemed to require Landlord to so acquiesce and any acquiescence,
if given, can be terminated by Landlord, at any time. The provisions of this
paragraph do not exclude Landlord's rights of re-entry or any other right or
remedies provided or allowed hereunder and/or by law. There shall be no renewal
of this Lease by operation of law. Nothing in this Paragraph shall be construed
as a consent by Landlord to the possession of the Premises by Tenant after the
expiration of the Term or any permitted termination of the Lease by Landlord.

20. NOTICES

        (a) Any notice by either party to the other shall be valid only if in
writing and shall be deemed to be duly given only if delivered personally or
sent by certified mail return receipt requested addressed (i) if to Tenant, at
the Premises and (ii) if to Landlord, at Landlord's addresses set forth above,
or at such other address for either party as that party may designate by notice
in writing to the other. Notice shall be deemed given, if delivered personally,
upon delivery thereof, and if sent by certified mail return receipt requested,
three (3) days after deposit with the United States Postal Service.

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<PAGE>   41

        (b) Tenant hereby appoints as its agent to receive service of all
dispossessory or distraint proceedings, an employee of Tenant at the Premises at
the time of such service.

21. HEIRS, SUCCESSORS, AND ASSIGNS-PARTIES

        (a) The provisions of this Lease shall bind and inure to the benefit of
Landlord and Tenant, and their respective successors, heirs, legal
representatives and permitted assigns, it being understood that the term
"Landlord" as used in this Lease means only the owner (or the ground lessee) for
the time being of the Building of which the Premises are a part, so that in the
event of any sale or sales of said Building (or of any lease thereof), Landlord
named herein shall be and hereby is entirely released of all covenants and
obligations of Landlord hereunder accruing thereafter, and it shall be deemed
without further agreement that the purchaser, or the new ground lessee, as the
case may be, has assumed and agreed to carry out any and all covenants and
obligations of Landlord hereunder during the period such party has possession of
the Building. Should the Complex be severed as to ownership by sale and/or
lease, then the owner of the Building or lessee of the Building that has the
right to lease space in the Building to tenants shall be deemed "Landlord".
Tenant shall be bound to any such succeeding party for performance by Tenant of
all the terms, covenants, and conditions of this Lease and agrees to execute any
attornment agreement not in conflict with the terms and provisions of this Lease
at the request of such party.

        (b) The terms "Landlord" and "Tenant" and pronouns relating thereto, as
used herein, shall include male, female, singular and plural, corporation,
partnership or individual, as may fit the particular parties.

22. ATTORNEY'S FEES

        In the event of any law suit or court action between Landlord and Tenant
arising out of or under this Lease or the terms and conditions stated herein,
the prevailing party in such law suit or court action shall be entitled to and
shall collect from the non-prevailing party the reasonable attorney's fees and
court costs actually incurred by the prevailing party with respect to said
lawsuit or court action.

23. TIME OF THE ESSENCE

        It is understood and agreed between the parties hereto that time is of
the essence of all the terms, provisions, covenants and conditions of this
Lease.

24. NO ESTATE IN LAND

        Tenant has only a usufruct under this Lease, not subject to levy or
sale. No estate shall pass out of Landlord by this Lease.

25. SECURITY DEPOSIT

        Landlord shall retain the security deposit paid under the Existing Lease
of $28,781.44 as a security deposit for the performance by Tenant of all the
terms, covenants and conditions of this Lease upon Tenant's part to be
performed. Unless required to do so by law, Landlord shall have no obligation
to segregate such security deposit from any other funds of Landlord, and
interest earned on such security deposit, if any, shall belong to Landlord.
Security deposits shall not be considered advance payments of Rent or a measure
of Landlord's damages, in the case of a default by Tenant. The security deposit
shall be returned to Tenant within thirty (30) days after the Expiration Date,
provided Tenant has fully performed its obligations hereunder. Regardless of any
permitted assignment of this Lease by Tenant, Landlord may return the security
deposit to the original Tenant in the absence of evidence satisfactory to
Landlord of an assignment of the right to receive the security deposit or the
balance thereof, which shall satisfy in full Landlord's obligation to return the
security deposit. Landlord shall have the right to apply any part of said
security deposit to cure any default of Tenant and if Landlord does so, Tenant
shall upon demand deposit with Landlord the amount so applied so that Landlord
shall have the full security deposit on deposit at all times during the Term of
this Lease. In the event of a sale or lease of the Building subject to this
Lease, Landlord shall transfer the security deposit to the Purchaser or lessee,
and Landlord shall thereupon be released from all liability for the return of
such security deposit and Tenant shall look solely to

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<PAGE>   42

the successor Landlord for the return of the security deposit. This provision
shall apply to every transfer or assignment made of the security deposit to a
successor Landlord. The security deposit shall not be assigned or encumbered by
Tenant without the prior written consent of Landlord and any such unapproved
assignment or encumbrance shall be void.

26. COMPLETION OF THE PREMISES

        The Work Agreement sets forth, among other things, Landlord's and
Tenant's agreement regarding improvements if any, to be made to the Premises.
Any work required by Tenant as provided for in said Exhibit "D" shall be
performed within the provisions and according to all standards of said Exhibit
"D".

27. PARKING AND ACCESS AREAS

        (a) Landlord shall maintain unreserved parking facilities for the
purpose of accommodating Tenant, Tenant's invitees and employees, and other
tenants, their invitees and employees, subject to such limitations and
conditions from time to time imposed by Landlord and subject to reservation of
certain parking spaces for particular tenants. Said parking shall be maintained
on the Property or on areas located in the vicinity of the Property. Said
parking shall be provided in quantities which are in accordance with the zoning
regulations or variances then in effect for the Property in which the Building
is located.

        (b) Tenant agrees that the number of parking spaces in the Project
actually used by Tenant and its employees and guests will never at any time
exceed the ratio of 4.0 parking spaces per 1,000 rentable square feet of the
Premises. Landlord shall have the right to undertake any measures or promulgate
and enforce any rules and regulations which Landlord deems necessary or
appropriate to enforce this provision, including, by way of illustration but not
limitation, restricting access to such parking spaces, or parking fines against
or towing the automobiles of violating parties.

28. RULES AND REGULATIONS

        The Rules and Regulations (collectively "Rules") set forth on Exhibit
"C" are incorporated into and made a part of this Lease. Landlord may from time
to time amend, modify, delete or add new and additional reasonable Rules for the
use, operation, safety, cleanliness and care of the Premises and the Building.
Such new or modified Rules shall be effective upon notice thereof to Tenant.
Tenant will cause its employees and agents, or any others permitted by Tenant to
occupy or enter the Premises to abide by the Rules at all times. In the event of
any breach of any Rules and failure to cure as permitted hereunder, Landlord
shall have all remedies provided for in this Lease in the event of default by
Tenant and shall, in addition, have any remedies available at law or in equity,
including but not limited to, the right to enjoin any breach of the Rules.
Landlord shall not be responsible to Tenant for the nonobservance of the Rules
by any other tenant or person.

29. RIGHT TO RELOCATE

        If the Premises contains less than 5,000 square feet of rentable area,
Landlord may move Tenant from the Premises to other office space within the
Complex by giving Tenant not less than thirty (30) days' written notice,
provided such other office space is substantially equivalent in area and
interior finish (but not necessarily floor plan lay-out) to the Premises. If
Tenant fails to relocate to such other office space or, in Landlord's sole
opinion, unreasonably delays in relocating to such other office space, Tenant
shall be in default hereunder, and notwithstanding any other provision herein to
the contrary, Landlord, upon giving Tenant not less than fifteen (15) days
written notice, shall immediately, without any further notice, be entitled to
exercise any and all of Landlord's remedies hereunder in the event of default.
If Landlord shall exercise its rights under this provision, Landlord shall
reimburse Tenant for Tenant's actual and reasonable out-of-pocket expenses
(including but not limited to moving costs, new stationery, business cards and
similar paper products of Tenant which include Tenant's address) incurred in
moving to such relocated Premises after Tenant shall submit to Landlord an
invoice together with evidence of the actual expenses incurred by Tenant.

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<PAGE>   43

30. LATE PAYMENTS - ACCORD AND SATISFACTION

        Any payment due of Tenant hereunder not received by Landlord within ten
(10) days of the date when due shall be assessed a five percent (5%) charge for
Landlord's administrative and other costs in processing and pursuing the payment
of such late payment, and shall be assessed an additional five percent (5%)
charge for the aforesaid costs of Landlord for each month thereafter until paid
in full. No payment by Tenant or receipt by Landlord of a lesser amount than any
installment or payment of Rent then due shall be deemed to be other than on
account of the earliest stipulated Rent or other sums then due and payable under
this Lease; nor shall any endorsement or statements on any check or any letter
or other writing accompanying any check or payment be deemed an accord and
satisfaction. Landlord may accept such check or payment without prejudice to
Landlord's right to recover the balance of such Rent or other sums then due
under this Lease or pursue any other remedy provided in this Lease.

31. ESTOPPEL CERTIFICATE

        At any time, Tenant shall, within ten (10) days of the request by
Landlord, execute, acknowledge and deliver to Landlord, any Mortgagee,
prospective Mortgagee or any prospective purchaser of the Property, the Building
and the Complex, or both (as designated by Landlord), an Estoppel Certificate in
recordable form, or in such other form which Landlord requires, evidencing
whether or not (a) this Lease is in full force and effect; (b) this Lease has
been amended in any way; (c) Tenant has accepted and is occupying the Premises;
(d) there are any existing defaults on the part of Landlord hereunder or
defenses or offsets against the enforcement of this Lease to the knowledge of
Tenant (specifying the nature of such defaults, defenses or offsets, if any) (e)
the date to which Rent and other amounts due hereunder, if any, have been paid;
and (f) any such other information reasonably requested by Landlord. Each
certificate delivered pursuant to this Paragraph may be relied on by Landlord,
any prospective purchaser or transferee of Landlord's interest hereunder, or any
Mortgagee or prospective Mortgagee. Tenant irrevocably appoints Landlord as its
attorney-in-fact, coupled with an interest, to execute and deliver, for and in
the name of Tenant, any document or instrument provided for in this paragraph,
if Tenant fails to provide same in a timely manner.

32. SEVERABILITY AND INTERPRETATION

        (a) If any clause or provision of this Lease shall be deemed illegal,
invalid or unenforceable under present or future laws effective during the Term,
the remainder of this Lease shall not be affected by such illegality, invalidity
or unenforceability, and in lieu of each clause or provision of this Lease that
is illegal, invalid or unenforceable, there shall be added as a part of this
Lease a clause or provision as similar in terms to such illegal, invalid or
unenforceable clause or provision as may be possible and be legal, valid and
enforceable.

        (b) Should any provisions of this Lease require judicial interpretation,
it is agreed that the court interpreting or construing the same shall not apply
a presumption that the terms of any such provision shall be more strictly
construed against one party or the other by reason of the rule of construction
that a document is to be construed most strictly against the party who itself or
through its agent prepared the same, it being agreed that the agents of all
parties hereto have participated in the preparation of this Lease.

33. MULTIPLE TENANTS

        If more than one individual or entity comprises and constitutes Tenant,
then all individuals and entities comprising Tenant are and shall be jointly and
severally liable for the due and proper performance of Tenant's duties and
obligations arising under or in connection with this Lease.

34. FORCE MAJEURE

        Notwithstanding any provision in this Lease to the contrary, Landlord
shall be excused for the period of any delay and shall not be deemed in default
with respect to the performance of any of the terms, covenants, and conditions
of this Lease when prevented from so doing by causes beyond Landlord's control,
which shall include, but not be limited to, all labor disputes, governmental
regulations or controls, fire or other casualty, inability to obtain any
material or services, or acts of God.

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<PAGE>   44

35. QUIET ENJOYMENT

        So long as Tenant is in full compliance with the terms and conditions of
this Lease, Landlord shall warrant and defend Tenant in the quiet enjoyment and
possession of the Premises during the Term against any and all claims made by,
through or under Landlord, subject to the terms of this Lease.

36. BROKERAGE COMMISSION; INDEMNITY

        FAISON & ASSOCIATES, INC. ("FAISON") HAS ACTED AS AGENT FOR LANDLORD IN
THIS TRANSACTION. NO BROKER HAS ACTED AS AGENT FOR TENANT IN THIS TRANSACTION.
FAISON SHALL BE PAID A COMMISSION BY LANDLORD. Tenant warrants that there are no
other claims for broker's commissions or finder's fees in connection with its
execution of this Lease. Tenant hereby indemnifies Landlord and holds Landlord
harmless from and against all claims, loss, cost, damage or expense, including,
but not limited to, reasonable attorney's fees actually incurred without regard
to any statutory presumption and court costs, incurred by Landlord as a result
of or in conjunction with a claim of any real estate agent or broker, if made
by, through or under Tenant relative to this Lease. Landlord hereby indemnifies
Tenant and holds Tenant harmless from and against all claims, loss, cost, damage
or expense, including, but not limited to, reasonable attorney's fees actually
incurred without regard to any statutory presumption and court costs, incurred
by Tenant as a result of or in conjunction with a claim of any real estate agent
or broker, if made by, through or under Landlord, relative to this Lease.

37. EXCULPATION OF LANDLORD

        (a) Notwithstanding any provision in this Lease to the contrary,
Landlord and Landlord's managing agent's liability with respect to or arising
from or in connection with this Lease shall be limited solely to Landlord's
interest in the Complex. Neither Landlord, any of the partners of Landlord, any
officer, director, principal, trustee, policyholder, shareholder, attorney nor
employee of Landlord or its managing agent shall have any personal liability
whatsoever with respect to this Lease.

        (b) Landlord and Landlord's managing agent shall have absolutely no
personal liability with respect to any provision of this Lease or any obligation
or liability arising from this Lease or in connection with this Lease. Tenant
shall look solely to the equity of Landlord in the Complex for the satisfaction
of any money judgment to Tenant. Such exculpation of liability shall be absolute
and without exception whatsoever.

38. ORIGINAL INSTRUMENT

        Any number of counterparts of this Lease may be executed, and each such
counterpart shall be deemed to be an original instrument.

39. APPLICABLE LAW

        This Lease has been made under and shall be construed, interpreted and
enforced under and in accordance with the laws of the State of Georgia.

40. NO RECORDATION OF LEASE

        Without the prior written consent of Landlord, neither this Lease nor
any memorandum hereof shall be recorded or placed on public record.

41. HAZARDOUS WASTES

        Neither Tenant, its successors or assigns, nor any permitted assignee or
sublessee, licensee or other person or entity acting by or through Tenant, shall
(either with or without negligence) cause or permit the escape, disposal or
release of any "Hazardous Substances, or Materials" (as hereinafter defined).
Tenant shall not allow the storage or use of such Hazardous Substances or
Materials in any manner not sanctioned by law and by the highest standards
prevailing in the

                                       21
<PAGE>   45

industry for the storage and use of such Hazardous Substances or Materials, nor
allow to be brought into the Complex, the Property or the Premises any such
Hazardous Substances or Materials except to use in the ordinary course of
Tenant's business, relative to office copiers and then only if such Hazardous
Substances or Materials are not prohibited by (and are only in amounts permitted
by) law, after notice is given to Landlord of the identity of such Hazardous
Substances or Materials. Without limitation, Hazardous Substances or Materials
shall include any biologically or chemically active substance and any waste,
substance or material described in Section 101(14) of the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended from
time to time, 42 U.S.C. Section 9601 et seq., the Resource Conservation and
Recovery Act, as amended from time to time, 42 U.S.C. Section 6901 et seq., any
applicable state or local laws and the regulations adopted under these acts. If
any lender or governmental agency shall ever require testing to ascertain
whether or not there has been any release of Hazardous Substances or Materials,
then the reasonable costs thereof shall be reimbursed by Tenant to Landlord upon
demand as additional charges if such requirement applies to the Premises. In
addition, Tenant shall execute affidavits, representations and the like from
time to time at Landlord's request concerning Tenant's best knowledge and belief
regarding the presence of Hazardous Substances or Materials on the Premises, the
Complex or the Property. Tenant indemnifies and covenants and agrees at its sole
cost and expense, to protect and save Landlord harmless against and from any and
all damages, losses, liabilities, obligations, penalties, claims, litigation,
demands, defenses, judgments, suits, proceedings, costs, or expenses of any kind
or of any nature whatsoever (including without limitation, reasonable attorney's
fees and expert's fees) which may at any time be imposed upon, incurred by or
asserted or awarded against Landlord arising from or out of any Hazardous
Substances or Materials on, in, under or affecting the Premises, the Complex or
the Property or any part thereof as a result of any act or omission by Tenant,
its successors or assigns, or any permitted assignee, permitted sublessee or
licensee or other person or entity acting at the direction with the consent of
Tenant. The within covenants shall survive the expiration or earlier termination
of the Lease Term.

42. BANKRUPTCY

        (a) The following shall be events of bankruptcy under this Lease: (i)
Tenant's becoming insolvent, as that term is defined in Title 11 of the United
States Code, entitled "Bankruptcy, 11 U.S.C., Sec. 101, et. seq." (the
"Bankruptcy Code"), or under applicable insolvency laws (the "Insolvency Laws");
(ii) the appointment of a receiver or custodian for any or all of Tenant's
property or assets, if such appointment shall not be dismissed within ninety
(90) days; or (iii) the filing of a voluntary petition under the provisions of
the Bankruptcy Code or the Insolvency Laws; or (iv) the filing of an involuntary
petition under the provisions of the Bankruptcy Code or the Insolvency Laws,
which is not dismissed within sixty (60) days of filing; or (v) Tenant's making
or consenting to an assignment for the benefit of creditors or a common law
composition of creditors.

                In the event of Tenant's bankruptcy, Landlord at its option may,
in addition to all other rights and remedies provided in this Lease at law or in
equity, terminate this Lease by giving written notice to Tenant. If termination
of this Lease shall be stayed by order of any court having jurisdiction over any
bankruptcy or insolvency proceeding or by federal or state statute, then,
following the expiration of any such stay, or if Tenant or Tenant as
debtor-in-possession or the trustee appointed in any such proceeding (being
collectively referred to as "Tenant" only for the purposes of this Section)
shall fail to assume Tenant's obligations under this Lease within the period
prescribed therefor by law or within fifteen (15) days after entry of the order
for relief or as may be allowed by the court, or if Tenant shall fail to provide
adequate protection of Landlord's right, title and interest in and to the
Premises or adequate assurance of the complete and continuous future performance
of Tenant's obligation under this Lease, Landlord, to the extent permitted by
law or by leave of the court having jurisdiction over such proceeding, shall
have the right, at its election, to terminate this Lease on fifteen (15) days'
notice to Tenant and upon the expiration of said fifteen (15) day period this
Lease shall cease and expire as aforesaid and Tenant shall immediately quit and
surrender the Premises as aforesaid. Upon the termination of this Lease as
provided above, Landlord, without notice, may re-enter and repossess the
Premises using such force for that purpose as may be necessary without being
liable to indictment, prosecution or damages therefor and may dispossess Tenant
by summary proceedings or otherwise.

        (b) For the purposes of the preceding paragraph (a), adequate protection
of Landlord's right, title and interest in and to the Premises, and adequate
assurance of the complete and

                                       22
<PAGE>   46

continuous future performance of Tenant's obligations under this Lease, shall
include, without limitation, the following requirements:

        (i)   that Tenant comply with all of its obligations under this Lease;

        (ii)  that Tenant pay to Landlord, on the first day of each month
              occurring subsequent to the entry of such order, or the effective
              date of such stay, a sum equal to the amount by which the Premises
              diminished in value during the immediately preceding monthly
              period, but, in no event, shall such amount be less than the
              aggregate Rental payable for such monthly period;

        (iii) that Tenant continue to use the Premises in the manner originally
              required by the Lease;

        (iv)  that Landlord be permitted to supervise the performance of
              Tenant's obligations under this Lease;

        (v)   that Tenant pay to Landlord within fifteen (15) days after entry
              of such order or the effective date of such stay, as partial
              adequate protection against future diminution in value of the
              premises and adequate assurance of the complete and continuous
              future performance of Tenant's obligations under this Lease, an
              additional security deposit in an amount acceptable to Landlord;

        (vi)  that Tenant has and will continue to have unencumbered assets
              after the payment of all secured obligations and administrative
              expenses to assure Landlord that sufficient funds will be
              available to fulfill the obligations of Tenant under this Lease;

        (vii) that if Tenant assumes this Lease and proposes to assign the same
              (pursuant to Title 11 U.S.C. Section 365, or as the same may be
              amended) to any person who shall have made a bona fide offer to
              accept an assignment of this Lease on terms acceptable to such
              court having competent jurisdiction over Tenant's estate, then
              notice of such proposed assignment, setting forth (x) the name and
              address of such person, (y) all of the terms and conditions of
              such offer, and (z) the adequate assurance to be provided Landlord
              to assure such person's future performance under this Lease,
              including, without limitation, the assurances referred to in Title
              11 U.S.C. Section 365(b)(3), as it may be amended, shall be given
              to Landlord by Tenant no later than fifteen (15) days after
              receipt by Tenant of such offer, but in any event no later than
              thirty (30) days prior to the date that Tenant shall make
              application to such court for authority and approval to enter into
              such assignment and assumption, and Landlord shall thereupon have
              the prior right and option, to be exercised by notice to Tenant
              given at any time prior to the effective date of such proposed
              assignment, to accept, or to cause Landlord's designee to accept,
              an assignment of this Lease upon the same terms and conditions and
              for the same consideration, if any, as the bona fide offer made by
              such person less any brokerage commissions which may be payable
              out of the consideration to be paid by such person for the
              assignment of this Lease; and

        (vii) that if Tenant assumes this Lease and proposes to assign the same,
              and Landlord does not exercise its option pursuant to paragraph
              (vii) of this Section, Tenant hereby agrees that:

              (A) such assignee shall have a net worth not less that the net
                  worth of Tenant as of the Commencement Date, or such Tenant's
                  obligations under this Lease shall be unconditionally
                  guaranteed by a person having a net worth equal to Tenant's
                  net worth as of the Commencement Date;

              (B) such assignee shall not use the Premises except subject to
                  all the restrictions contained in this Lease;

                                       23
<PAGE>   47
              (C) such assignee shall assume in writing all of the terms,
                  covenants and conditions of this Lease including, without
                  limitation, all of such terms, covenants and conditions
                  respecting the Uses permitted herein and payment of Rent, and
                  such assignee shall provide Landlord with assurances
                  satisfactory to Landlord that it has the operating experience
                  sufficient to enable it so to comply with the terms, covenants
                  and conditions of this Lease and successfully operate the
                  Premises;

              (D) such assignee shall indemnify Landlord against, and pay to
                  Landlord the amount of, any payments which may be obligated to
                  be made to any Mortgagee by virtue of such assignment;

              (E) such assignee shall pay to Landlord an amount equal to the
                  unamortized portion of any construction allowance made to
                  Tenant; and

              (F) if such assignee makes any payment to Tenant, or for
                  Tenant's account, for the right to assume this Lease
                  (including, without limitation, any lump sum payment,
                  installment payment or payment in the nature of rent over and
                  above the Rental payable under this Lease), Tenant shall pay
                  over to Landlord one-half of any such payment, less any amount
                  paid to Landlord pursuant to clause (E) above on account of
                  any construction allowance.

        As a material inducement to Landlord executing this Lease, Tenant
acknowledges and agrees that Landlord is relying upon (i) the financial
condition and specific operating experience of Tenant and Tenant's obligation to
use the Premises specifically in accordance with this Lease, (ii) Tenant's
timely performance of all of its obligations under this Lease notwithstanding
the entry of an order for relief under the Bankruptcy Code or the Insolvency
Laws for Tenant and (iii) all defaults under the Lease being cured promptly and
the Lease being assumed within 60 days of any order for relief entered under the
Bankruptcy Code or the Insolvency Laws for Tenant, or the Lease being rejected
within such 60-day period and the Premises surrendered to Landlord.

        Accordingly, in consideration of the mutual covenants contained in this
Lease and for other good and valuable consideration, Tenant hereby agrees that:

        (i)   All obligations that accrue under this Lease (including the
              obligation to pay rent), from and after the date that a petition
              is filed or other action is commenced under the Bankruptcy Code or
              the Insolvency Laws (an "Action") shall be timely performed
              exactly as provided in this Lease and any failure to so perform
              shall be harmful and prejudicial to Landlord;

        (ii)  Any and all rents that accrue from and after the date that an
              Action is commenced and that are not paid as required by this
              Lease shall, in the amount of such rents, constitute
              administrative expense claims allowable under the Bankruptcy Code
              with priority of payment at least equal to that of any other
              actual and necessary expenses incurred after the commencement of
              the Action;

        (iii) Any extension of the time period within which Tenant may assume or
              reject the Lease without an obligation to cause all obligations
              under the Lease to be performed as and when required under the
              Lease shall be harmful and prejudicial to Landlord;

        (iv)  Any time period designated as the period within which Tenant must
              cure all defaults and compensate Landlord for all pecuniary losses
              that extends beyond the date of assumption of the Lease shall be
              harmful and prejudicial to Landlord;

                                       24
<PAGE>   48

        (v)   Any assignment of the Lease must result in all terms and
              conditions of the Lease being assumed by the assignee without
              alteration or amendment, and any assignment that results in an
              amendment or alteration of the terms and conditions of the Lease
              without the express written consent of Landlord shall be harmful
              and prejudicial to Landlord;

        (vi)  Any proposed assignment of the Lease to an assignee: (1) that will
              not use the Premises specifically in accordance with the Lease,
              (2) that does not possess financial condition, operating
              performance and experience characteristics equal to or better than
              the financial condition, operating performance and experience of
              Tenant as of the date of this Lease, or (3) that does not provide
              guarantors of the Lease obligations with financial condition equal
              to or better than the financial condition of the original
              guarantors of the Lease as of the date of this Lease, shall be
              harmful and prejudicial to Landlord;

        (vii) The rejection (or deemed rejection) of the Lease for any reason
              whatsoever shall constitute cause for immediate relief from the
              automatic stay provisions of the Bankruptcy Code, and Tenant
              stipulates that such automatic stay shall be lifted immediately
              and possession of the Premises will be delivered to Landlord
              immediately without the necessity of any further action by
              Landlord.

        No provision of this Lease shall be deemed a waiver of Landlord's rights
or remedies under the Bankruptcy Code, the Insolvency Laws, or applicable law to
oppose any assumption and/or assignment of this Lease, to require timely
performance of Tenant's obligations under this Lease, or to regain possession of
the Premises as a result of the failure of Tenant to comply with the terms and
conditions of this Lease or the Bankruptcy Code.

        Notwithstanding anything in this Lease to the contrary, all amounts
payable by Tenant to or on behalf of Landlord under this Lease, whether or not
expressly denominated as such, shall constitute "rent" for purposes of the
Bankruptcy Code.

        For purposes of this Section addressing the rights and obligations of
Landlord and Tenant if an Action is commenced, the term "Tenant" shall include
Tenant's successor in bankruptcy, whether a trustee, Tenant as debtor in
possession or other responsible person."

43. SIGNS

        No sign of any type or description shall be erected, placed or painted
in or about the Premises, the Complex or the Property, except those signs
submitted to Landlord in writing, and approved by Landlord in writing, which
signs shall be in conformance with Landlord's sign criteria established for the
Complex.

44. CONTROL OF COMMON AREAS AND PARKING FACILITIES

        All automobile parking areas, driveways, entrances and exits thereto,
and other facilities furnished by Landlord, including all parking areas, truck
way or ways, loading areas, pedestrian walkways and ramps, landscaped areas,
stairways, corridors, and other areas and improvements provided by Landlord for
the general use, in common (the "Common Areas"), of tenants, their officers,
agents, employees, servants, invitees, licensees, visitors, patrons and
customers, shall be at all times subject to the exclusive control and management
of Landlord, and Landlord shall have the right but not the obligation from time
to time to establish, modify, and enforce reasonable rules and regulations with
respect to the Common Areas; to police same, from time to time (it being
expressly understood that such right of Landlord shall in no event be construed
to create any affirmative duty or obligation on the part of Landlord to police
or provide security or protection or give rise to any liability of Landlord in
the event of a third-party's criminal act); to change the area, level and
location and arrangement of parking areas and other facilities hereinabove
referred to; to restrict parking by, and enforce parking charges (by operation
of meters or otherwise) to tenants, their officers, agents, invitees, employees,
servants, licensees, visitors, patrons, and customers; to close all or any
portion of said areas or facilities to such extent as may, in the opinion of
Landlord's counsel, be legally sufficient to prevent a dedication thereof or the
accrual of any rights to any

                                       25
<PAGE>   49

person of the public therein; to close temporarily all or any portion of the
Common Areas; to discourage non-tenant parking; to charge a fee for visitors and
customer parking; and to do and perform such other acts in and to said areas and
improvements as, in the sole judgment of Landlord, shall be advisable with a
view to the improvement of the convenience and use thereof by tenants, their
officers, agents, employees, servants, invitees, visitors, patrons, licensees
and customers. Landlord will operate and maintain the Common Areas in such a
reasonable manner as Landlord shall determine from time to time. Without
limiting the scope of such discretion, Landlord shall have the full right and
authority but not the obligation to designate a manager of the parking
facilities or Common Areas or other facilities, who shall have full authority to
make and enforce rules and regulations regarding the use of the same and to
employ all personnel and to make and enforce all Rules pertaining to, and
necessary for, the proper operation and maintenance of the parking areas or the
Common Areas. Tenant shall comply (and shall require all persons within its
control to comply) with such Rules, upon notice of same.

45. NO SMOKING

        Tenant acknowledges that "smoking" is prohibited in all areas of the
Premises, the Complex (including common areas and all grounds) and the Property
except in areas, if any, outside the Building (and outside any other building in
the Complex) that are designated by Landlord as "Designated Smoking Areas".
Landlord shall have the right, but not the obligation, to designate an area or
areas outside buildings in the Complex as "Designated Smoking Areas". Landlord
shall have the right from time to time to change and or limit such Designated
Smoking Areas and to enact future rules and regulations concerning smoking in
such Designated Smoking Areas, including the right in Landlord's discretion, to
prohibit smoking in the Designated Smoking Areas or the right to refuse to
designate Designated Smoking Areas. Tenant agrees to comply in all respects with
Landlord's prohibition and regulation of smoking and to enforce compliance
against its employees, agents, invitees and other persons under the control and
supervision of Tenant on the Premises, Complex and Property. Any violation of
this provision shall be a default under this Lease and in addition and without
limiting Landlord's rights and remedies in consequence of such default, entitle
Landlord to assess a monetary fine against Tenant for each violation of this
Section in the amount of $25.00. For purposes hereof, "smoking" means inhaling,
exhaling, burning or carrying any lighted cigar, cigarette, pipe or other
smoking equipment or device in any manner or form. Notwithstanding anything in
this Lease to the contrary, no liability shall attach to Landlord for any
failure to enforce this provision (or similar provisions in other leases).

46. PRIOR OCCUPANCY

        If Tenant, with Landlord's consent shall occupy the Premises prior to
the beginning of the Term specified in Section 1(c) hereof, all provisions of
this Lease shall be in full force and effect commencing upon such occupancy, and
Rent for such period shall be paid by Tenant at the same rate herein specified.

47. GUARANTEE

        As an inducement for Landlord to enter into this Lease, Landlord shall
be provided with a guaranty in the form attached as Exhibit "H".

48. LEASE BINDING UPON DELIVERY

        This Lease shall not be binding until and unless all parties have duly
executed said Lease and a fully executed counterpart of said Lease has been
delivered to Tenant.

49. SPECIAL STIPULATIONS

        The special stipulations attached hereto on Exhibit "F" and made a part
hereof, if any, shall control if in conflict with any of the foregoing
provisions of this Lease.

50. HEADINGS

        The headings in this Lease are included for convenience only and shall
not be taken into consideration in any construction or interpretation of any
part of this Lease.

                                       26
<PAGE>   50

51. SURRENDER OF LEASE NOT MERGER

        The voluntary or other surrender of this Lease by Tenant, or a mutual
cancellation hereof, shall not work a merger and may, at the option of Landlord,
terminate all or any existing subleases or subtenants, or may, at the option of
Landlord, operate as an assignment to Landlord of any or all such subleases or
subtenants.

52. MORTGAGEE PROTECTION

        If there is a default by Landlord under this Lease, Tenant covenants to
give notice by registered mail to, in addition to Landlord, any grantee of a
deed to secure debt, mortgagee under a mortgage, or beneficiary under a deed of
trust encumbering the Premises, whose address shall have been furnished it, and
shall offer such grantee, mortgagee or beneficiary, a reasonable opportunity to
cure the default, including time to obtain possession of the Premises by power
of sale or judicial foreclosure, if such should prove necessary to effect a
cure.

53. INTERFERENCE

        Landlord shall have no liability to Tenant nor shall Tenant have any
right to terminate this Lease or claim any offset against or reduction in any
sum to be paid hereunder because of interference with, or impairment to any
extent, of light, air, visibility, or view, or because of damage or
inconvenience due to noise, vibration or other matters resulting from the
excavation, construction, repair or addition of or to, buildings adjacent to or
near the Complex. No easement of light or air is granted in this Lease or
otherwise.

54. NO PARTNERSHIPS

        Landlord shall not by the execution of this Lease in any way or for any
purpose become a partner of Tenant in the conduct of its business or otherwise,
or joint venturer or a member of a joint enterprise with Tenant.

55. ADA

        Tenant shall be responsible for compliance with Title III of the
American with Disabilities Act of 1990 ("ADA") within the Premises and Landlord
shall be responsible for compliance with Title III of the ADA relative to the
Common Areas within the remainder of the Complex.

56. USE OF PRONOUN, RELATIONSHIP

        The use of the neuter singular pronoun to refer to Landlord or Tenant
shall be deemed a proper reference even though Landlord or Tenant may be an
individual, a partnership, a corporation, a trust or a group of two or more
individuals or corporations. The necessary grammatical changes required to make
the provisions of this Lease apply in the plural sense when there is more than
one Tenant and to either corporations, trusts, associations, partnerships, or
individuals, males or females, shall in all instances be assumed as though in
each case fully expressed.

57. SURRENDER

        No surrender of the Premises, or of the remainder of the Term of this
Lease, shall be valid unless accepted in writing by Landlord.

58. WAIVER OF JURY TRIAL

        TO THE EXTENT PERMITTED BY LAW, IT IS MUTUALLY AGREED BY AND BETWEEN
LANDLORD AND TENANT THAT THE RESPECTIVE PARTIES HERETO SHALL, AND THEY DO
HEREBY, WAIVE TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM BROUGHT
BETWEEN THE PARTIES HERETO OR THEIR SUCCESSORS OR ASSIGNS ON ANY MATTERS ARISING
OUT OF, OR IN ANY WAY CONNECTED WITH, THIS LEASE, THE RELATIONSHIP OF LANDLORD
AND TENANT, AND/OR TENANT'S USE OF, OR OCCUPANCY OF, THE PREMISES. TENANT
FURTHER AGREES THAT IT SHALL NOT INTERPOSE ANY COUNTERCLAIM OR

                                       27
<PAGE>   51
COUNTERCLAIMS IN A SUMMARY PROCEEDING OR IN ANY ACTION BASED UPON NON-PAYMENT OF
RENT OR ANY OTHER PAYMENT REQUIRED BY TENANT HEREUNDER. THIS WAIVER IS MADE
FREELY AND VOLUNTARILY, WITHOUT DURESS AND ONLY AFTER EACH OF THE PARTIES HERETO
HAS HAD THE BENEFIT OF ADVICE FROM LEGAL COUNSEL ON THIS SUBJECT.

59.     NO THIRD PARTY BENEFICIARY.

        This Agreement is only intended to benefit, and is only enforceable by
and against the parties hereto, their successors and assigns and no provisions
herein are intended to benefit or be enforceable by any persons not a party to
or successor or assign to any of the parties herein.

60.     REPRESENTATIONS OF TENANT.

        Tenant, by its execution hereof, represents and warrants to Landlord and
its successors and assigns that as of the date hereof Tenant is a duly
established and validly existing corporation of the State of __________ and that
the individual(s) signing this Lease on behalf of Tenant has/have been duly
authorized to do so and thereby bind Tenant.

        IN WITNESS WHEREOF, Landlord and Tenant have caused this Lease to be
executed under seal, on the day and year first above written.

                                       TENANT:

                                       EXACTIUM, INC.

                                       /s/ ELI BARAK
                                       ------------------------------------
                                       Authorized Signature

                                       Eli Barak
                                       ------------------------------------
                                       Type Name of Signatory

                                       /s/ JEANNE B. JAMBER
                                       ------------------------------------
                                       Authorized Signature

                                       Jeanne B. Jamber
                                       ------------------------------------
                                       Type Name of Signatory

                                       Tenant Tax Identification Number

                                       58-2260868
                                       ------------------------------------
                                       Date Executed by Tenant: 12/2/97
                                                                -----------

                                                                (CORPORATE SEAL)

Note:   If Tenant is a corporation, two authorized corporate officers must
        execute this Lease in their appropriate capacities for Tenant, affixing
        the corporate seal.

                                       "LANDLORD"

                                       BEACON PROPERTIES, L.P., a Delaware
                                       limited partnership

                                       By: Beacon Properties Corporation,
                                           General Partner

                                       By: /s/ DONALD B. BROOKS
                                          ------------------------------------
                                       Donald B. Brooks, Senior Vice President

                                       Date Executed by Landlord: 12-10-97
                                                                 -------------
                                                                (CORPORATE SEAL)
                                                       11/5/97

                                       28
<PAGE>   52

                                  EXHIBIT "A"

                         [FLOOR PLAN SUITE 200 GRAPHIC]
<PAGE>   53

                                  EXHIBIT "B"

                          LEGAL DESCRIPTION OF THE LAND

All that tract and parcel of land lying and being in land lot 37 of the 17th
district of Fulton County, Georgia as shown and described on Property Line Plat
for The Landmarks Group prepared by Roger L. Cordes & Associates and dated
August 19,1970 and being more particularly described as follows:

Beginning at a point on the southerly line of land lot 37, said district and
county, located 150.0' easterly, as measured along said land lot line from the
easterly right-of-way line of Glenridge Drive and running thence n.01 degrees
33'30"w. 220.9' to a point; thence n.03 degrees 33'w. 98.8' to a point; thence
s.85 degrees 14'30"w.5.0' to a point; thence n.06 degrees 13'30"w.5.0' to a
point; thence s.63 degrees 55'30"w. 156.7' to the easterly right-of-way line of
Glenridge Drive; thence northerly along said Glenridge Drive 51.9' to a point;
thence s.85 degrees 14'30"w. along said Glenridge Drive 5.0' to a point; thence
northerly along said Glenridge Drive 7.1' to a point; thence n. 63 degrees
55'30"s. 159.4' to a point; thence n. 06 degrees 13'30"w. 76.3' to a point;
thence n.09 degrees 41'w. 75.0' to a point, thence s. 63 degrees 55'30"w. 139.6'
to a point; thence s.06 degrees 13'30"e. 77.8' to a point; thence s.63 degrees
55'30"w. 15.0" to the easterly right-of-way line of Glenridge Drive; thence
northerly along said Glenridge Drive 190.8' to a point; thence n.78 degrees
16'30"e. 145.9' to a point; thence n.09 degrees 41'w. 188.1' to the
southeasterly line of property now or formerly owned by Lane; thence n.66
degrees 41'30"e. along said Lane property 1,064.7' to the westerly right-of-way
and limit of access line of the North Fulton Expressway; thence s. ll degrees
32'e. along said North Fulton Expressway 241.2' to a concrete monument at the
beginning of a ramp connecting said expressway with said Interstate Highway 285;
thence southwesterly along, and following the curvature of said right-of-way and
limit of access line of said ramp 1,342.9' to an iron pin corner on the
southerly line of said land lot 37; thence n.89 degrees 07'30"w. along said land
lot line 170.2' to the point of beginning. Together with full fights of ingress
and egress to and from Glenridge Drive over the parcel of land separating the
herein described parcel from said Glenridge Drive.

<PAGE>   54

                                   EXHIBIT "C"

                              RULES AND REGULATIONS

        1. No sign, picture, advertisement or notice shall be displayed by
Tenant on any part of the Premises or the Complex unless the same is first
approved by Landlord. Any such sign, picture, advertisement or notice approved
by Landlord shall be painted or installed for Tenant by Landlord at Tenant's
expense. No awnings, curtains, blinds, shades or screens shall be attached to or
hung in, or used in connection with any window or door of the Premises without
the prior consent of the Landlord, including approval by Landlord of the
quality, type, design, color and manner of attachment.

        2. Tenant agrees that its use of electrical current shall never exceed
the capacity of existing feeders, risers or wiring installation.

        3. Tenant shall not do or permit to be done in or about the Premises or
Complex anything which shall increase the rate of insurance on said Complex or
obstruct or interfere with the rights of other lessees of Landlord or annoy them
in any way, including, but not limited to, using any musical instrument, making
loud or unseemly noises, or singing, etc., nor use the Premises for sleeping,
lodging, or cooking by any person at any time except with permission of
Landlord. Tenant will be permitted to use for its own employees within the
Premises a conventional coffeemaker. No vending machines of any kind will be
installed, permitted or used on any part of the Premises. No part of said
Complex or Premises shall be used for gambling, immoral or other unlawful
purposes. No intoxicating beverage shall be sold in said Complex or Premises
without prior written consent of Landlord. No area outside of the Premises shall
be used for storage purposes at any time.

        4. No bicycles, motorcycles or other motorized vehicles, birds or
animals of any kind shall be brought into said Complex. All vehicles shall be
parked only in areas designated therefor by Landlord.

        5. The sidewalks, entrances, passages, corridors, halls, elevators, and
stairways in the Complex shall not be obstructed by Tenant or used for any
purposes other than those for which same were intended as ingress and egress. No
windows, floors or skylights that reflect or admit light into the Complex shall
be covered or obstructed by Tenant. Toilets, wash basins and sinks shall not be
used for any purpose other than those for which they were constructed, and no
sweeping, rubbish, or other obstructing or improper substances shall be thrown
therein. Any damage resulting to them, or to heating apparatus, from misuse by
Tenant or its employees, shall be borne by Tenant.

        6. Only one key for each office in the Premises will be furnished Tenant
without charge. No additional lock, latch or bolt of any kind shall be placed
upon any door nor shall any changes be made in existing locks or mechanisms
thereof without written consent of Landlord. At the termination of the Lease,
Tenant shall return to Landlord all keys furnished to Tenant by Landlord, or
otherwise procured by Tenant, and in the event of loss of any keys so furnished,
Tenant shall pay to Landlord the cost thereof.

        7. Landlord shall have the right to prescribe the weight, position and
manner of installation of heavy articles such as safes, filing cabinets,
machines and other equipment which Tenant may use in the Premises. No safes,
furniture, boxes, large parcels or other kind of freight shall be taken to or
from the Premises or allowed in any elevator, hall or corridor at any time
except by permission of and at times allowed by Landlord. Tenant shall make
prior arrangements with Landlord for use of freight elevator for the purpose of
transporting such articles and such articles may be taken in or out of said
Complex only between or during such hours as may be arranged with and designated
by Landlord. The persons employed to move the same must be approved by Landlord.
In no event shall any weight be placed upon any floor by Tenant so as to exceed
50 pounds per square foot of floor space without prior written approval of
Landlord.

        8. Tenant shall not cause or permit any gases, liquids or odors to be
produced upon or permeate from the Premises, and no flammable, combustible,
explosive, toxic or other hazardous fluid, chemical or substance shall be
brought into the Complex.

<PAGE>   55

        9. The Complex shall be open to Tenant, its employees, and business
visitors, between the hours of 7:00 a.m. and 6:00 p.m., on all days except
Saturdays, Sundays and holidays and on Saturdays between the hours of 7:00 a.m.
and 1:00 p.m. Landlord may implement a card access security system to control
access during other times. Landlord shall not be liable for excluding any person
from the Complex during other times, or for admission of any person to the
Complex at any time, or for damages or loss for theft resulting therefrom to any
person, including Tenant.

        10. Unless explicitly permitted by the Lease, Tenant shall not employ
any person other than Landlord's contractors and employees for the purpose of
cleaning and taking care of the Premises. Landlord shall not be responsible for
any loss, theft, mysterious disappearance of or damage to, any property, however
occurring. Only persons authorized by Landlord may furnish ice, drinking water,
towels, and other similar services within the Complex and only at hours and
under regulations fixed by Landlord.

        11. No connection shall be made to the electric wires or gas or electric
fixtures, without the consent in writing on each occasion of Landlord. All
glass, locks and trimmings in or upon the doors and windows of the Premises
shall be kept whole and in good repair. Tenant shall not injure, overload or
deface the Complex, the woodwork or the walls of the Premises, nor permit upon
the Premises any noisome, noxious, noisy or offensive business.

        12. If Tenant requires wiring for a bell or buzzer system, such wiring
shall be done by the electrician of the Landlord only, and no outside wiring men
shall be allowed to do work of this kind unless by the written permission of
Landlord or its representatives. If telegraph or telephonic service is desired,
the wiring for same shall be approved by Landlord, and no boring or cutting for
wiring shall be done unless approved by Landlord or its representatives, as
stated. The electric current shall not be used for power or heating unless
written permission to do so shall first have been obtained from Landlord or its
representatives in writing, and at an agreed cost to Tenant.

        13. Tenant and its employees and invitees shall observe and obey all
parking and traffic regulations as imposed by Landlord.

        14. Canvassing, peddling, soliciting and distribution of handbills or
any other written materials in the Complex are prohibited, and Tenant shall
cooperate to prevent the same.

        15. Landlord shall have the right to change the name of the Complex and
to change the street address of the Complex, provided that in the case of a
change in the street address, Landlord shall give Tenant not less than 180 days'
prior notice of the change, unless the change is required by governmental
authority.

        16. Landlord may waive any one or more of these Rules and Regulations
for the benefit of any particular lessee, but no such waiver by Landlord shall
be construed as a waiver of such Rules and Regulations in favor of any other
lessee, nor prevent Landlord from thereafter enforcing any such Rules and
Regulations against any or all of the other lessees of the Complex.

        17. These Rules and Regulations are supplemental to, and shall not be
construed to in any way modify or amend, in whole or in part, the terms,
covenants, agreements and conditions of the Lease.

        18. Landlord reserves the right to make such other and reasonable Rules
and Regulations as in its judgment may from time to time be needed for the
safety, care and cleanliness of the Complex and the Property, and for the
preservation of good order therein.

<PAGE>   56

                                    EXHIBIT D

                                 WORK AGREEMENT

        In consideration of the mutual covenants and agreements contained in
this Lease and in this Exhibit D, Landlord and Tenant do hereby expressly agree
as follows:

        1. DESIGN OF TENANT'S WORK. Landlord and Tenant have agreed on a
preliminary plan described on Exhibit D - Schedule 3 (the "Preliminary Plan")
for the improvements required by Tenant for the Premises, and the current
estimate of the cost to complete the work contemplated by this preliminary plan
is $21,164.53 (which cost shall be Tenant's cost, if incurred). Tenant shall, at
Tenant's cost and expense, using an architect that shall be first approved by
Landlord, cause final detail design plans, specifications and working drawings
designated as being ready for construction to be prepared in accordance with all
applicable laws, ordinances, rules, regulations and codes of all governmental or
quasi- governmental bodies (hereinafter collectively referred to as "Legal
Requirements") and to be approved, in writing, by both Landlord and Tenant
(hereinafter collectively referred to as "Tenant's Plans"). Subject to the
provisions of paragraph 7 below in this Work Agreement Tenant may use "Tenant's
Allowance" (hereinafter defined) for payment of preparation of Tenant's Plans.
For the convenience of Tenant and on behalf of the Tenant, Landlord, as Tenant's
agent, has contracted with __________ to prepare Tenant's Plans for Tenant
pursuant to the provisions hereof. Tenant's Plans shall include, but not be
limited to demolition plans, the location of all interior partitions, doors,
electrical switches and outlets and telephone outlets; reflected ceiling plan
showing the location of all lights, fans, diffusers, and vents, electrical
outlets, plumbing and mechanical plans, floor and wall coverings; signs and such
other items as may be necessary or desirable in order to determine if, in
Landlord's sole opinion, the work shown on Tenant's Plans is aesthetically
compatible with the surrounding improvements, and in order to allow the Landlord
to obtain accurate bids on, and to accurately determine the cost to complete the
installation of all such work shown on the Tenant's Plans (hereinafter
collectively referred to as "Tenant's Work"). Tenant's Plans shall be minimum
1/8-inch scale architectural and engineering drawings although details may be
shown with a different scale. Tenant shall submit four (4) copies of Tenant's
Plans to Landlord within thirty (30) days after the execution and delivery of
this Lease by both Landlord and Tenant. Tenant's Plans shall conform to and be
consistent with the Preliminary Plan. Landlord shall within five (5) business
days either approve (or approve with conditions) Tenant's Plans or disapprove
Tenant's Plans and give Tenant the reasons for such disapproval. If Landlord
shall disapprove Tenant's Plans, Tenant shall make the changes to Tenant's Plans
as required by Landlord in order to obtain Landlord's approval of Tenant's Plans
and Tenant shall resubmit Tenant's Plans to Landlord for Landlord's written
approval. If Landlord has "approved with conditions" Tenant shall either accept
in writing such conditions or resubmit the Tenant's Plans with changes to
correct the issues that are the basis for such conditions and in such event,
such resubmission shall be treated in the same way as if the Tenant's Plans had
been initially disapproved by Landlord. This procedure shall continue until
Tenant's Plans shall be finally approved, in writing, by Landlord and Tenant.
Landlord agrees to give Tenant its approval or disapproval of Tenant's Plans
within five (5) business days of the date Tenant shall submit or resubmit any
plans to Landlord. If Tenant shall fail to obtain Landlord's approval of
Tenant's Plans within forty (40) days after the date of this Lease, for reasons
other than a Landlord delay approving or giving comments to Tenant's Plans, then
such delay after forty (40) days shall be a Tenant Delay for purposes of Section
4 (b) hereof. Four (4) sets of Tenant's Plans as finally approved by both
Landlord and Tenant shall be signed and dated by both Landlord and Tenant as
ready for construction. Three (3) signed copies of same shall be retained by
Landlord and one (1) signed copy shall be retained by Tenant. Tenant's Work
performed pursuant to this Exhibit D shall be deemed permanent fixtures and
shall become the property of Landlord upon completion of same by Landlord.

        2. REVIEW OF TENANT'S PLANS. The review and approval of Tenant's Plans
by Landlord are solely for purposes of determining, in Landlord's sole opinion,
whether or not Tenant's Plans are compatible with the function, design, capacity
and layout of the mechanical, structural, electrical and plumbing systems,
facilities and equipment located in the Building. The Landlord shall not be
liable in any way whatsoever to the Tenant or to any other person for the
performance, design or

<PAGE>   57

quality of Tenant's Work, for its failure to comply with applicable legal
requirements or for the utility or functional aspects of Tenant's Work.

        3. PERFORMANCE OF TENANT'S WORK

             (a) Unless Landlord and Tenant otherwise agree, after approval of
Tenant's Plans, Landlord shall obtain, if Landlord does not act as CM
coordinator, three (3) bids from outside contractors approved by Landlord to
perform Tenant's Work. Landlord agrees to use the contractor providing the
lowest bid and such bid price plus Landlord's direct contractor cost(s) and
construction management fee (as set forth in 3(e) below) shall for purposes of
this Lease be the "Cost of Tenant's Work".

             (b) If Landlord shall be delayed in completing Landlord's
construction as a result of:

             (i) Tenant's request for materials, finishes or installations other
        than Landlord's standard; or

             (ii) Tenant's changes in the approved plans; or

             (iii) Tenant's failure to approve the plans and specifications or
        the estimate of construction costs in a timely manner pursuant to the
        provisions hereinabove set forth; or

             (iv) The performance of work by a person, firm or corporation
        employed by Tenant and delays in the completion of said work by said
        person, firm or corporation, then, Tenant agrees to pay to Landlord, in
        addition to any sum provided above, a sum equal to any additional cost
        to Landlord in completing Landlord's construction resulting from any of
        the foregoing failures, acts or omissions of Tenant. Any such sums may
        be collected by Landlord as "additional rent" from time to time, upon
        demand, whether or not the Term shall have commenced and in the event of
        the default in payment thereof, Landlord shall (in addition to all other
        remedies) have the same rights as in the event of default in payment of
        Rent. All such delays in this Section shall be called Tenant Delays and
        shall not cause any extension or delay of the Commencement Date of this
        Lease as provided in Section 1 and 4 of the Lease.

             (c) Promptly after approval of Tenant's Plans and the "Cost of
Tenant's Work" (as hereinafter defined) by Landlord and Tenant, and provided
Tenant has paid Landlord the "Cost Differential" (as hereinafter defined), if
any, Landlord shall cause construction of Tenant's Work to be commenced.
Landlord shall use reasonable efforts to cause Tenant's Work to be completed
substantially in accordance with the Tenant's Plans in a prompt manner subject,
however, to an extension of said number of days for a period of time equal to
the period of time that the performance of Landlord's obligations is prevented,
delayed, retarded or hindered by acts of God, weather or unusual severity, fire,
earthquake, flood, explosion, action of the elements, malicious mischief,
inability to procure or general shortage of labor, services material, equipment,
facilities, or supplies in the open market, failure of transportation, strikes,
lockouts, actions of labor unions, condemnation, public requisition, laws,
orders of government or civil or defense authorities, or any other cause,
whether similar or dissimilar to the foregoing, not within the reasonable
control of Landlord (all the foregoing hereinafter collectively referred to as
"Unavoidable Delays"). In the event of any Unavoidable Delays, from time to
time, during the course of performing Tenant's Work, the number of days set
forth above in this Paragraph 4 shall be increased each time by a number of days
equal to the number of days of each such delay.

             (d) Tenant hereby appoints JEANNE B. JAMBOR as the authorized
representative of Tenant for purposes of dealing with Landlord with respect to
all matters involving, directly or indirectly, Tenant's Plans and Tenant's Work
including without limitation, change orders to Tenant's Plans (such person
hereinafter referred to as the "Designated Representative"). Tenant hereby
warrants and represents to Landlord that the Designated Representative has the
requisite power and authority to deal with Landlord in the manner

<PAGE>   58

contemplated herein and that Tenant shall be bound by the acts and omissions of
the Designated Representative.

             (e) Subject to the provisions set forth in this Exhibit D and
Landlord's receipt of a building permit, Landlord shall commence construction of
Tenant's Work within ten (10) days after final approval by Landlord of Tenant's
Plans and approval by Landlord of the cost to complete Tenant's Work
(hereinafter referred to as the "Cost of Tenant's Work"). Tenant acknowledges
and agrees that the Cost of Tenant's Work shall include a construction
management fee payable to Landlord in the amount of six (6%) percent of the Cost
of Tenant's Work as CM coordinator.

        5. NOTICE OF SUBSTANTIAL COMPLETION. Upon completion of the Tenant's
Work substantially in accordance with Tenant's Plans, Landlord shall furnish
Tenant with notice thereof. Within five (5) days after receipt of such notice
from Landlord:

             (a) Tenant shall execute and deliver to Landlord an Estoppel
Statement in the form attached hereto as Schedule 1 and incorporated herein by
this reference;

             (b) Tenant shall execute and deliver to Landlord the Certificate as
to Term of Lease attached hereto as Schedule 2 and incorporated herein by this
reference if requested by Landlord;

             (c) Tenant shall pay the first installment of Base Rental due under
the Lease;

             (d) Tenant shall pay to Landlord the unpaid balance, if any, of the
Cost Differential (which is hereinafter defined in Section 8 below); and

             (e) Tenant shall furnish Landlord at Tenant's expense with final
as-built plans of Tenant's Work on reproducible mylar drawn to minimum 1/8-inch
architectural scale.

        Promptly upon receipt of all of the items set forth above in this
Paragraph 5, or at Landlord's election prior to such receipt, Landlord shall
tender possession of the Premises to Tenant by written notice to Tenant.

        6. TENANT'S INSPECTION OF PREMISES.

             (a) Within five (5) days after the date of notice of substantial
completion referred to in Paragraph 5 of this Exhibit D, the Designated
Representative and Landlord shall jointly inspect the Premises for purposes of
determining whether or not any unfinished work required to be performed pursuant
to Tenants' Plans (such unfinished work hereinafter referred to as "Punchlist
Items") remains incomplete. Landlord shall be responsible for causing the
Punchlist Items to be completed as expeditiously as reasonably practicable, but
in any event within ninety (90) days after the date of notice of substantial
completion, subject, however, to extensions of such ninety (90) day period
resulting from Unavoidable Delays. Substantial completion of the Premises shall
be deemed to have occurred so long as any Punchlist item does not reasonably
prevent Tenant from beneficially occupying substantially all of the Premises and
using the Premises for the purposes set forth in Paragraph 6 of this Lease.

             (b) The Designated Representative may, from time to time, visit the
Premises and inspect same and may consult with Landlord and its supervisors,
architects, engineers, and agents, provided, however, that the Designated
Representative shall comply with all applicable legal requirements and the
requirements of all insurance policies carried by Landlord with respect to the
Premises which may prohibit, limit or condition access to the Premises by
Tenant, or others, during the period of such construction. Tenant shall promptly
notify Landlord of any deviations from Tenant's Plans in the construction of the
Premises of which Tenant has knowledge.

        7. TENANT'S WORK. Tenant shall take and accept the Premises "as is,
where is", with no obligation on the part of Landlord to provide any work within
the Premises or any allowance therefor.

<PAGE>   59

        8. CHANGE ORDERS. After commencement of Tenant's Work by Landlord, but
before the commencement of any changes to Tenant's Plans, such changes to
Tenant's Plans and the cost thereof (either deductive or additional) shall be
mutually agreed upon in writing by Landlord and Tenant and the cost of Tenant's
Work shall be adjusted accordingly. No changes to Tenant's Work will be
performed without written approval from Landlord and Tenant. Tenant shall comply
with all of Landlord's requirements (as to submittals, details, cost figures,
cooperation, and any other items and procedures) as to each such request for a
change to Tenant's Plans. If any change results in an increase in the cost of
Tenant's Work, an amount of money equal to such increase shall be paid to
Landlord simultaneously with the approval of such change by both Landlord and
Tenant or the payment thereof shall otherwise be secured in a manner acceptable
to Landlord. If, in Landlord's opinion, any change will prevent the Landlord
from completing Tenant's Work within the number of days set forth in Paragraph 4
of this Exhibit D, then such number of days shall be increased by a number of
days which shall be sufficient, in Landlord's reasonable estimation, to allow
completion of Tenant's Work and such change.

<PAGE>   60

                              EXHIBIT D SCHEDULE 1

                               ESTOPPEL STATEMENT

RE:       Lease Dated:        Amended:
          Landlord:           BEACON PROPERTIES, L.P.
          Tenant:             EXACTIUM, INC.

          Premises:

        As Tenant under the above-referenced Lease, the undersigned hereby
acknowledges for the benefit of Beacon Properties, L.P., which has or is about
to acquire the property in which the Premises are located, the truth and
accuracy of the following statements pertaining to the Lease.

        1. Tenant has accepted, is satisfied with, and is in full possession of
said Premises, including all improvements, additions and alterations thereto
required to be made by Landlord under the Lease.

        2. The Lease is in full force and effect, and Tenant is paying the full
rent stipulated in the Lease with no offsets, defenses or claims.

        3. Landlord has not been and is not presently in default under any of
the terms, covenants or provisions of the Lease.

        4. Landlord has complied with all of the requirements and conditions
precedent to the commencement of the term of the Lease as specified in the
Lease.

        5. The fixed annual base rent under the Lease is $______ and no monies
have been paid to Landlord in advance of the due date set forth in the Lease
described above, except.______________________________________________.

        6. The Lease is for a term of ______ years expiring __________, and
Tenant has been in occupancy and paying rent since the term commenced
on__________________________.

        7. No monetary or other considerations, including but not limited to
rental concessions by Landlord, tenant improvements in excess of building
standard, or Landlord's assumption of prior lease obligations of Tenant, have
been granted to Tenant by Landlord for entering into the Lease,
except ____________________.

        8. Tenant has not been and is not presently in default under any of the
terms, covenants or provisions of the Lease.

        9. Tenant has delivered to Landlord a security deposit in the amount of
$___________.

        10. Tenant acknowledges (a) that there have been no modifications or
amendments to the Lease other than herein specifically stated, (b) it has no
notice of a prior assignment, hypothecation or pledge of rents or of the Lease,
and (c) the Lease represents the entire agreement between Landlord and Tenant,
(d) no prepayment or reduction of rent and no modification, termination, or
acceptance of surrender of the Lease will be valid as to Beacon Properties, L.P.
without the consent of said company, and (e) notice of the proposed assignment
of Landlord's
<PAGE>   61

interest in the Lease may be given it by certified or registered mail, return
receipt requested, at the Premises, or as otherwise directed below.

                                       TENANT:

                                       EXACTIUM, INC.

                                       By:
                                          ---------------------------------

                                       Title:
                                             ------------------------------

                                       Date:
                                            -------------------------------

(Address to which notices are
to be sent to Tenant if other
than to the Premises)

-----------------------------------

-----------------------------------

-----------------------------------

<PAGE>   62

                              EXHIBIT D SCHEDULE 2

                         CERTIFICATE AS TO TERM OF LEASE

        WHEREAS, Beacon Properties, L.P. ("Landlord") and EXACTIUM, INC.
("Tenant") entered into that certain Lease dated _____ (the "Lease");

        WHEREAS, Landlord has delivered possession of the Premises pursuant to
the Lease;

        WHEREAS, Landlord and Tenant desire to confirm the date the Lease
commences the date the Term expires, the dates Base Rent is due during the Term
and the Base Year for purposes of the Lease.

        NOW, THEREFORE, Landlord and Tenant hereby agree as follows:

        1. For all purposes of this Certificate, all terms used herein that are
defined in the Lease shall have the same meanings ascribed to them in the Lease.

        2. The Term commenced on the _____ day of _______, 19__, and, unless
sooner terminated or extended as provided in the Lease, shall expire _____day of
_______, 19__, at 5:00 o'clock p.m.

        3. Tenant has accepted possession of the Premises, including all
improvements, additions and alterations to be made by Landlord under the Lease.

        4. The first monthly installment of Base Rental in accordance with the
Lease has been paid, and each monthly installment of Base Rental thereafter
shall be due and payable on the first (1st) day of each month commencing _______
through and including _______. Accordingly, Base Rental shall be due and payable
in the following amounts in accordance with the Lease through the following
dates:

<TABLE>
<CAPTION>
 DATE                                   MONTHLY INSTALLMENT AMOUNT
 ----                                   --------------------------
<S>                                     <C>
</TABLE>

        5. The Base Year for the Lease shall be the calendar year _____.

        6. Landlord and Tenant hereby ratify and affirm the Lease and agree the
Lease remains in full force and effect in accordance with its term, provided,
however, to the extent of any conflict between the Lease and this Certificate,
this Lease Certificate shall control.
<PAGE>   63

        IN WITNESS WHEREOF, Landlord and Tenant hereby execute this Certificate
under seal this _____ day of _______, 19__.

                           LANDLORD:

                           BEACON PROPERTIES, L.P.

                           By: Beacon Properties Corporation, General Partner
                              -----------------------------------------------

                           By:
                              -----------------------------------------------
                                 Donald B. Brooks, Senior Vice President

                           TENANT:

                           EXACTIUM, INC.

                           By:
                              ------------------------------------
                           Print or Type Name:
                                              --------------------
                           Title:
                                 ---------------------------------
<PAGE>   64

                              EXHIBIT D SCHEDULE 3

                                PRELIMINARY PLAN

                         [FLOOR PLAN SUITE 200 GRAPHIC]
<PAGE>   65

                                   EXHIBIT "E"

                           PROHIBITED USES OF PREMISES

        Notwithstanding anything to the contrary contained in the Lease, the
Premises shall not be used for or as:

        (a) a school or other school or instructional activities and purposes; a
church or other religious activities; a trade association office or facility or
to promote any trade association activities or similar purposes; a union office
or to promote union activities or purposes; government owned or affiliated
office or facility; any pornographic or prurient sex related activity or purpose
(such as, but not limited to, an escort service or telephone sex service); a
medical or dental office; or

        (b) any office that, by its nature, shall involve operations
substantially on a round-the-clock, 24 hour basis; or shall constitute a
material additional burden to the services of the Building as compared to normal
general office uses for standard building hours and holidays.

<PAGE>   66

                                  EXHIBIT "F"

                              SPECIAL STIPULATIONS

        1. Right of First Refusal. Provided this Lease is then in full force and
effect and Tenant is in full compliance with the terms and conditions of this
Lease, and there is no sublease of any portion of the Premises or assignment of
any of Tenant's interest in the Lease, Landlord hereby grants Tenant the right
to lease the approximately 1,338 rentable square feet known as "Suite 290" in
the Building (the "Expansion Space") in accordance with the within terms and
conditions. Should Landlord receive an offer from an unaffiliated third party to
lease the Expansion Space, upon terms and conditions and at a rental rate
acceptable to Landlord, Landlord shall notify Tenant thereof in writing, and
offering to lease the Expansion Space to Tenant upon the same terms and
conditions as leased under this Lease. Tenant shall have three (3) days to
accept or reject such offer. If Tenant rejects such offer or fails to respond
within said three (3) day period, then Landlord shall be entitled to rent said
space to such third party. If Tenant accepts said offer, then Tenant shall have
leased such space upon the same terms and conditions as leased under this Lease
and for a term co-terminus with the Lease, except that the space shall be leased
"as is, where is". The Rent for said Expansion Space shall commence on the
earlier to occur of (i) thirty (30) days after Tenant accepts such offer for
such Expansion Space, or (ii) on the date Tenant occupies said Expansion Space.

        2. See "Exactium Additional Language" regarding additional space
<PAGE>   67
                          EXACTIUM ADDITIONAL LANGUAGE

     If Tenant desires to lease at least an additional five thousand (5,000)
rentable square feet in the Building (the "Expansion Space"), as such desire is
evidenced by a notice to Landlord, then Landlord shall endeavor to provide such
space to Tenant in the Building, subject to and conditioned upon the following:

          (i)    Tenant must be in compliance with all terms and conditions of
                 this Lease for such options to be effective;

          (ii)   Landlord may provide such Expansion Space to Tenant in any
                 location or locations within the Building as Landlord elects as
                 long as such space is at least five thousand (5,000) rentable
                 square feet in size, in the aggregate, and such space may be
                 offered in one or more blocks of space, and may not be
                 contiguous to the Premises;

          (iii)  Once Landlord provides the Expansion Space, then Tenant shall
                 be obligated and hereby covenants and agrees to lease such
                 Expansion Space. Such Expansion Space shall be leased to Tenant
                 on an "as is, where is" basis, on the same terms and conditions
                 as the Premises is leased to Tenant, at the same rate of Rent
                 (on a per square foot per annum basis), for a term co-terminus
                 with the Term, with any allowances provided for under the Lease
                 pro-rated to reflect the shorter duration of the Term.

          (iv)   If Landlord is not able to provide such space to Tenant within
                 ninety (90) days after Tenant first gives notice to Landlord of
                 Tenant's desire to so lease such Expansion Space, then Tenant
                 shall have the right to terminate this Lease and lease space in
                 another building owned by Landlord, such option to be
                 exercised, if at all, within ten (10) days after Tenant first
                 has notice that Landlord is unable to provide such space to
                 Tenant, and such termination to be effective no less than
                 ninety (90) days after Tenant's notice of termination to
                 Landlord; provided, however, as a part of and at the time of
                 such cancellation Tenant shall pay to Landlord the unamortized
                 amount of the leasing commissions incurred as a part of this
                 Lease (such amortization occurring over the full term of the
                 Lease, on a straight-line basis).
<PAGE>   68

                                   EXHIBIT "G"

                            COMPLEX STANDARD SERVICES

        Landlord shall furnish the following services to Tenant during the Term
(the "Building Standard Services"):

        (a) Hot and cold domestic water and common-use restrooms and toilets at
locations provided for general use and as reasonably deemed by Landlord to be in
keeping with comparable office buildings to the Complex.

        (b) Subject to curtailment as required by governmental laws, rules or
mandatory regulations and subject to the design conditions hereinafter provided,
central heat and air conditioning in season, at such temperatures and in such
amounts as are reasonably deemed by Landlord to be in keeping with comparable
office buildings to the Complex. In order to enable the central heating and air
conditioning system to operate efficiently, Tenant agrees that it will not place
within the Premises more than one (1) person per 175 square feet of rentable
area. Such heating and air conditioning shall be furnished between 8:00 a.m. and
6:00 p.m. on weekdays (from Monday through Friday, inclusive) and between 8:00
a.m. and 1:00 p.m. on Saturdays, all exclusive of Holidays, as defined below
(the "Building Operating Hours").

        (c) Electric lighting service for all public areas and special service
areas of the Complex in the manner and to the extent reasonably deemed by
Landlord to be in keeping with the first-class standards of the Complex.

        (d) Janitor service shall be provided five (5) days per week, exclusive
of Holidays (as hereinbelow defined), in a manner that Landlord reasonably deems
to be consistent with the firstclass standards of the Complex.

        (e) Sufficient electrical capacity to operate (i) incandescent lights,
typewriters, calculating machines, photocopying machines and other machines of
the same low voltage electrical consumption (120 volts), provided that the total
rated electrical design load for said lighting and machines of low electrical
voltage shall not exceed 1.25 watts per square foot of rentable area; and (ii)
lighting (277 volts), provided that the total rated electrical design load for
said lighting shall not exceed 1.40 watts per square foot of rentable area (each
such rated electrical design load to be hereinafter referred to as the "Building
Standard rated electrical design load").

        Should Tenant's total rated electrical design load exceed the Building
Standard rated electrical design load for either low or high voltage electrical
consumption, or if Tenant's electrical design requires low voltage or high
voltage circuits in excess of Tenant's share of the Building Standard circuits,
Landlord will (at Tenant's expense) install such additional circuits and
associated high voltage panels and/or additional low voltage panels with
associated transformers shall be hereinafter referred to as the "additional
electrical equipment"). If the additional electrical equipment is installed
because Tenant's low or high voltage rated electrical design load exceeds the
applicable Building Standard rated electrical design load, then a meter shall
also be added (at Tenant's expense) to measure the electricity used through the
additional electrical equipment.

        The design and installation of any additional electrical equipment (or
any related meter) required by Tenant shall be subject to the prior approval of
Landlord (which approval shall not be unreasonably withheld). All expenses
incurred by Landlord in connection with the review and approval of any
additional electrical equipment shall also be reimbursed to Landlord by Tenant.
Tenant shall also pay on demand the actual metered cost of electricity consumed
through the additional electrical equipment (if applicable), plus any expenses
incurred by Landlord in connection with the metering thereof.

        If any of Tenant's electrical equipment requires conditioned air in
excess of Building Standard air conditioning, the same shall be installed by
Landlord (on Tenant's behalf), and Tenant shall pay all design, installation,
metering and operating costs relating thereto.

<PAGE>   69

        If Tenant requires that certain areas within Tenant's Premises must
operate in excess of the normal Building Operating Hours (as hereinabove
defined), the electrical service to such areas shall be separately circuited and
metered (at Tenant's expense) such that Tenant shall be billed the costs
associated with electricity consumed during hours other than Building Operating
Hours.

        (f) All Building Standard fluorescent bulb replacement in all areas and
all incandescent bulb replacement in public areas, toilet and restroom areas,
and stairwells.

        (g) Non-exclusive multiple elevator cab passenger service to the
Premises during Building Operating Hours (as hereinabove defined) and at least
one (1) elevator cab passenger service to the floors) on which the Premises are
located twenty-four (24) hours per day during Building Operating Hours (all
subject to temporary cessation for ordinary repair and maintenance and during
times when life safety systems override normal building operating systems) with
such freight elevator service available at other times upon reasonable prior
notice and the payment by Tenant to Landlord of any additional expense actually
incurred by Landlord in connection therewith.

        To the extent the services described above require electricity and water
supplied by public utilities, Landlord's covenants thereunder shall only impose
on Landlord the obligation to use its best efforts to cause the applicable
public utilities to furnish same. Except for deliberate and willful act of
Landlord, failure by Landlord to furnish the services described herein, or any
cessation thereof, shall not render Landlord liable for damages to either person
or property, not be construed as an eviction of Tenant, nor work an abatement of
rent, nor relieve Tenant from fulfillment of any covenant or agreement hereof.
In addition to the foregoing, should any of the equipment or machinery, for any
cause, fail to operate, or function properly, Tenant shall have no claim for
rebate of rent or damages on account of an interruption in service occasioned
thereby or resulting therefrom; provided, however, Landlord agrees to use
reasonable efforts to promptly repair said equipment or machinery and to restore
said services during normal business hours.

        The following dates shall constitute "Holidays" as that term is used in
this Lease Agreement: New Year's Day, Memorial Day, Independence Day, Labor Day,
Thanksgiving Day, Friday following Thanksgiving Day, Christmas, and any other
holiday generally recognized as such by landlords of office space in the
metropolitan Atlanta office market, as determined by Landlord in good faith. If
in the case of any specific holiday mentioned in the preceding sentence, a
different day shall be observed than the respective day mentioned, then that day
which constitutes the day observed by national banks in Atlanta, Georgia on
account of said holiday shall constitute the Holiday under this Lease Agreement.

<PAGE>   70

                                  EXHIBIT "H"

                                    GUARANTY

<PAGE>   71

TERMS OF LEASE

Exactium, Ltd.

The original Lease agreement for the Exactium, Ltd offce is in Hebrew.
Therefore, we have provided this summary of the terms of the agreement:

Planned Disposition: The landlord is terminating this lease effective May 1,
2000 because another party wishes to lease the space. Instead of subleasing, the
new tenant will contract directly with the landlord and terminate Exactium's
remaining obligation.

Rent Period: 5 years

Start Date: 10/1/97

Payment Dates: Every three months, in advance

Payment Amount: NIS 6,645 per month
          Exchange rate for 2/29/00 was 4.032 NIS/$
          Therefore, this is about $1,648.07 per month

The lease payment is linked to the Israeli pricing index.

The lease payment includes 3 parking places.

Management fees: $1.75 per square meter per month

Square meters: 136

City tax: NIS 648 per month (About 160.71 USD)

Offce cleaning: NIS 261 per month (About 64.73 USD)

Electricity: Average of NIS 200 per month (About 49.60 USD)

Agreement may be canceled with six months' advance notice but not before three
years have elapsed.

If the agreement is canceled, a fine will be due. If the agreement is canceled
before four years have elapsed, the fine will be one month for each two months
that have been canceled. If the agreement is canceled after four years have
elapsed, the fine will be one month for each three months that have been
canceled.

<PAGE>   72

Long-Term Loans / Capital Lease Obligations
Exactium Inc.
12/31/99

<TABLE>
<CAPTION>
    Loan            Balance       2000        2001        2002       Total      Total ST    Total LT     Total
    ----            -------       ----        ----        ----       -----      --------    --------     -----
<S>                 <C>          <C>          <C>         <C>       <C>         <C>         <C>          <C>
Dolphin Capital       1,889       1,210         679           0       1,889       1,210         679       1,889
Dell Financing          797         797           0           0         797         797           0         797
PM Group Life        24,508      24,508           0           0      24,508      24,508           0      24,508
Great America        17,636       6,740       7,155       3,741      17,636       6,740      10,897      17,636

Total                44,830      33,254       7,834       3,741      44,830      33,254      11,575      44,830
</TABLE>

<PAGE>   73
Exactium, Inc.
Capital Lease Schedules

Laptop Computers - 2
Lessor:     Dolphin Capital
Payments:   Monthly
Term:                           36 $1 Buy out
Monthly Payment:         $  118.28
Fair Market Value:       $3,389.00
Interest Rate                15.48%

<TABLE>
<CAPTION>
                    Interest     Principal     Balance
                    --------     ---------     -------
<S>                 <C>          <C>           <C>
     Jul-98           43.72        74.56       3,314.44
     Aug-98           42.76        75.52       3,238.91
     Sep-98           41.78        76.50       3,162.42
     Oct-98           40.80        77.48       3,084.93
     Nov-98           39.80        78.48       3,006.45
     Dec-98           38.78        79.50       2,926.95
     Jan-99           37.76        80.52       2,846.43
     Feb-99           36.72        81.56       2,764.87
     Mar-99           35.67        82.61       2,682.25
     Apr-99           34.60        83.68       2,598.57
     May-99           33.52        84.76       2,513.82
     Jun-99           32.43        85.85       2,427.96
     Jul-99           31.32        86.96       2,341.01
     Aug-99           30.20        88.08       2,252.92
     Sep-99           29.06        89.22       2,163.71
     Oct-99           27.91        90.37       2,073.34
     Nov-99           26.75        91.53       1,981.80
     Dec-99           25.57        92.71       1,889.09
     Jan-00           24.37        93.91       1,795.18
     Feb-00           23.16        95.12       1,700.06
     Mar-00           21.93        96.35       1,603.74
     Apr-00           20.69        97.59       1,506.12
     May-00           19.43        98.85       1,407.26
     Jun-00           18.15        100.13      1,307.14
     Jul-00           16.86        101.42      1,205.72
     Aug-00           15.55        102.73      1,102.99
     Sep-00           14.23        104.05        998.94
     Oct-00           12.89        105.39        893.55
     Nov-00           11.53        106.75        786.80
     Dec-00           10.15        108.13        678.67
     Jan-01            8.75        109.53        569.14
     Feb-01            7.34        110.94        458.20
     Mar-01            5.91        112.37        345.83
     Apr-01            4.46        113.82        232.01
     May-01            2.99        115.29        116.73
     Jun-01            1.51        116.77         (0.05)
</TABLE>
<PAGE>   74

Exactium, Inc.
Capital Lease Schedules

DESKTOP WORKSTATION
LESSOR:                 Dell Financial
PAYMENTS:               Monthly
TERM:                           24 $1 Buy Out
MONTHLY PAYMENT:                    $  118.75
FAIR MARKET VALUE:                  $2,500.00
INTEREST RATE:                          12.91%

<TABLE>
<CAPTION>
                                Interest        Principal       Balance
<S>                             <C>             <C>             <C>
Aug-98                            26.90           91.85         2,408.15
Sep-98                            25.91           92.84         2,315.30
Oct-98                            24.91           93.84         2,221.46
Nov-98                            23.90           94.85         2,126.61
Dec-98                            22.88           95.87         2,030.74
Jan-99                            21.85           96.90         1,933.84
Feb-99                            20.80           97.95         1,835.89
Mar-99                            19.75           99.00         1,736.89
Apr-99                            18.69          100.06         1,636.83
May-99                            17.61          101.14         1,535.69
Jun-99                            16.52          102.23         1,433.46
Jul-99                            15.42          103.33         1,330.13
Aug-99                            14.31          104.44         1,225.69
Sep-99                            13.19          105.56         1,120.13
Oct-99                            12.05          106.70         1,013.43
Nov-99                            10.90          107.85           905.58
Dec-99                             9.74          109.01           796.57
Jan-00                             8.57          110.18           686.39
Feb-00                             7.38          111.37           575.03
Mar-00                             6.19          112.56           462.47
Apr-00                             4.98          113.77           348.69
May-00                             3.75          115.00           233.69
Jun-00                             2.51          116.24           117.46
Jul-00                             1.26          117.49            (0.03)
</TABLE>

<PAGE>   75

                     PM GROUP -- VARIOUS COMPUTER EQUIPMENT

Exactium, Inc.
Capital Lease Schedules

Payment Amount           $5,000.00
Number of Payments              12
Annual Interest                 8%
Present Value           $57,478.91

<TABLE>
<CAPTION>
  PAYMENT      PAYMENT        PAYMENT      INTEREST    PRINCIPAL     INTEREST        REMAINING
   NUMBER       DATE           AMOUNT       RATE        AMOUNT        AMOUNT         PRINCIPAL
<S>            <C>           <C>           <C>        <C>           <C>             <C>
     1          6/1/99        $5,000.00      0.67%     $4,616.81      $383.19        $52,862.10
     2          7/1/99        $5,000.00      0.67%     $4,647.59      $352.41        $48,214.52
     3          8/1/99        $5,000.00      0.67%     $4,678.57      $321.43        $43,535.95
     4          9/1/99        $5,000.00      0.67%     $4,709.76      $290.24        $38,826.49
     5         10/1/99        $5,000.00      0.67%     $4,741.16      $258.84        $34,085.03
     6         11/1/99        $5,000.00      0.67%     $4,772.77      $227.23        $29,312.26
     7         12/1/99        $5,000.00      0.67%     $4,804.58      $195.42        $24,507.68
     8          1/1/00        $5,000.00      0.67%     $4,836.62      $163.38        $19,671.06
     9          2/1/00        $5,000.00      0.67%     $4,868.86      $131.14        $14,802.20
    10          3/1/00        $5,000.00      0.67%     $4,901.32       $98.68         $9,900.88
    11          4/1/00        $5,000.00      0.67%     $4,933.99       $66.01         $4,966.89
    12          5/1/00        $5,000.00      0.67%     $4,966.89       $33.11            ($0.00)

Totals                       $60,000.00               $57,478.91    $2,521.09
</TABLE>
<PAGE>   76
Phone system (Great America Leasing)
3/17/00 12:16

Payment Amount              $634.53
Number of Payments               36
Annual Interest                  6%
Present Value            $20,857.65

<TABLE>
<CAPTION>

     Payment   Invoice   Payment   Interest  Principal  Interest  Remaining
     Number     Date     Amount      Rate     Amount     Amount   Principal
<S>            <C>       <C>       <C>       <C>        <C>       <C>
      1         7/12/99  $634.53     0.50%    $530.24   $104.29   $20,327.40
      2         8/12/99  $634.53     0.50%    $532.89   $101.64   $19,794.51
      3         9/12/99  $634.53     0.50%    $535.56    $98.97   $19,258.95
      4        10/12/99  $634.53     0.50%    $538.24    $96.29   $18,720.72
      5        11/12/99  $634.53     0.50%    $540.93    $93.60   $18,179.79
      6        12/12/99  $634.53     0.50%    $543.63    $90.90   $17,636.16
      7         1/12/00  $634.53     0.50%    $546.35    $88.18   $17,089.81
      8         2/12/00  $634.53     0.50%    $549.45    $85.45   $16,540.73
      9         3/12/00  $634.53     0.50%    $551.83    $82.70   $15,988.90
     10         4/12/00  $634.53     0.50%    $554.59    $79.94   $15,434.32
     11         5/12/00  $634.53     0.50%    $557.36    $77.17   $14,876.96
     12         6/12/00  $634.53     0.50%    $560.15    $74.38   $14,316.82
     13         7/12/00  $634.53     0.50%    $562.95    $71.58   $13,753.87
     14         8/12/00  $634.53     0.50%    $565.76    $68.77   $13,188.11
     15         9/12/00  $634.53     0.50%    $568.59    $65.94   $12,619.52
     16        10/12/00  $634.53     0.50%    $571.43    $63.10   $12,048.09
     17        11/12/00  $634.53     0.50%    $574.29    $60.24   $11,473.80
     18        12/12/00  $634.53     0.50%    $577.16    $57.37   $10,896.64
     19         1/12/01  $634.53     0.50%    $580.05    $54.48   $10,316.59
     20         2/12/01  $634.53     0.50%    $582.95    $51.58    $9,733.64
     21         3/12/01  $634.53     0.50%    $585.86    $48.67    $9,147.78
     22         4/12/01  $634.53     0.50%    $588.79    $45.74    $8,558.99
     23         5/12/01  $634.53     0.50%    $591.74    $42.79    $7,967.25
     24         6/12/01  $634.53     0.50%    $594.69    $39.84    $7,372.56
     25         7/12/01  $634.53     0.50%    $597.67    $36.86    $6,774.89
     26         8/12/01  $634.53     0.50%    $600.66    $33.87    $6,174.24
     27         9/12/01  $634.53     0.50%    $603.66    $30.87    $5,570.58
     28        10/12/01  $634.53     0.50%    $606.68    $27.85    $4,963.90
     29        11/12/01  $634.53     0.50%    $609.71    $24.82    $4,354.19
     30        12/12/01  $634.53     0.50%    $612.76    $21.77    $3,741.43
     31         1/12/02  $634.53     0.50%    $615.82    $18.71    $3,125.61
     32         2/12/02  $634.53     0.50%    $618.90    $15.63    $2,506.71
     33         3/12/02  $634.53     0.50%    $622.00    $12.53    $1,884.71
     34         4/12/02  $634.53     0.50%    $625.11     $9.42    $1,259.61
     35         5/12/02  $634.53     0.50%    $628.23     $6.30      $631.37
     36         6/12/02  $634.53     0.50%    $631.37     $3.16       ($0.00)

Totals                $22,843.08           $20,857.65 $1,985.43
</TABLE>
<PAGE>   77

                                   APPENDIX K

                       TENANT\CONTRACTOR ASBESTOS NOTICE

TO:
FROM:
DATE:

We are committed to making Lakeside Office Park a safe and comfortable place to
work. This facility was constricted at a time when asbestos (a naturally
occurring mineral) was extensively used.

When in good condition, and not disturbed, asbestos-containing materials (ACM)
should not pose a health hazard,. There are no regulations requiring removal of
intact ACM in good condition unless disturbed by repair or renovation activity.
Do not disturb materials on the attached list, which identifies ACM locations in
this facility.

To reduce future risk, we have had an Operations and Maintenance Manual prepared
to provide guidance for those working on repair, renovation or installation
within our building until the asbestos is removed. To examine the Operations and
Maintenance Manual, contact Anne Wood/Malcolm Wordin, the "Asbestos
Coordinator".

Under the facility's Asbestos Operations and Maintenance Plan, contractor and
tenant employees must comply with the following general

        1.      Personnel of tenants and contractors performing any abatement,
                maintenance, renovation or cleaning activity in or near areas
                where ACM are present and may be disturbed must refer to the
                Operations and Maintenance Plan for appropriate guidance before
                beginning work. Such work shall only be performed by personnel
                who have been specially trained and authorized.

        2.      If ACM have been damaged or disturbed, do not try to sweep them
                up or otherwise further disturb them. Disturbing the materials
                may spread the asbestos fibers and make them airborne. Disturbed
                ACM must be cleaned by trained personnel according to approved
                procedures.

        3.      Any incidents involving damage to or significant changes in the
                condition of ACM must be reported immediately to the Asbestos
                Coordinator.

I have read and understand this notice. I will ensure that my company's
employees will follow the procedures and requirements as outlined above and in
the Operations and Maintenance Plan.

Signature  /s/ JEANNE B. JAMBOR
         -----------------------------------

Print Name  JEANNE B. JAMBOR
          ----------------------------------

Print Company Name  Exactium, Inc.
                  --------------------------

                                      K-1

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