Document:

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                                                                    EXHIBIT 4(L)

                      SIXTH AMENDMENT TO KOGER EQUITY, INC.
                          COMMON STOCK RIGHTS AGREEMENT
                           DATED AS OF AUGUST 17, 2000

         This Sixth Amendment to the Common Stock Rights Agreement dated as of
August 17, 2000 (the "Amendment"), is between Koger Equity, Inc., a Florida
corporation (the "Company") and Wells Fargo Bank Minnesota, N. A., formerly
Norwest Bank Minnesota, a National Association (the "Rights Agent"), and amends
the Common Stock Rights Agreement dated as of September 30, 1990 (the "Rights
Agreement" and as amended and in effect on the date hereof, prior to giving
effect to the Amendment, the "Amended Rights Agreement"). Unless otherwise
defined herein, capitalized terms in the Amendment shall have the same meaning
as those contained in the Rights Agreement.

                                  WITNESSETH:

         WHEREAS, on September 30, 1990, the Board of Directors of the Company
authorized the issuance of Rights to purchase, on the terms and subject to the
provisions of the Rights Agreement, shares of the Company's Common Stock; and

         WHEREAS, on September 30, 1990, the Board of Directors of the Company
authorized and declared a dividend distribution of one Right for every share of
Common Stock of the Company outstanding on the Dividend Record Date and
authorized the issuance of one Right (subject to certain adjustments) for each
share of Common Stock of the Company issued between the Dividend Record Date and
the Distribution Date; and

         WHEREAS, the Distribution Date has not occurred; and

         WHEREAS, pursuant to Section 27 of the Rights Agreement, the Continuing
Directors have unanimously approved an amendment of certain provisions of the
Amended Rights Agreement as set forth below;

         NOW, THEREFORE, in consideration of the premises, the mutual promises
herein set forth and other good and valid consideration the sufficiency hereof
and thereof being hereby acknowledged, the parties hereto hereby agree as
follows:

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<PAGE>   2

         1.       The Amended Rights Agreement is hereby amended as follows:

                  (a)      In Section 3(c), the reference in the legend
                  contained therein to Norwest, as Rights Agent under the
                  Amended Rights Agreement, is hereby deleted and substituted
                  therefore is Wells Fargo, as the Rights Agent under the
                  Amended Rights Agreement.

                  (b)      In Section 26 concerning the notice to the Rights
                  Agent, the reference to Norwest is hereby deleted, and
                  substituted therefore is the following:

<TABLE>
<CAPTION>
                  Mailing Address:                    Street (or Courier) Address
                  --------------------------------    ----------------------------
                  <S>                                 <C>
                  Wells Fargo Bank Minnesota, N. A.   Wells Fargo Bank Minnesota, N. A.
                  Shareowner Services                 Shareowner Services
                  P. O. Box 64854                     161 North Concord Exchange
                  St. Paul, MN  55164-0854            South St. Paul, MN  55075
</TABLE>

                  (c)      In the Form of Rights Certificate which is Exhibit A
                  to the Amended Rights Agreement, the references to Norwest as
                  the Rights Agent and as the Counter-signatory are hereby
                  deleted and substituted therefore is Wells Fargo.

         2.       Section 7(a) of the Rights Agreement is hereby amended to
         change the "Expiration Date" from September 30, 2000, to September 30,
         2010.

         3.       Exhibit A to the Rights Agreement, the "Form of Rights
         Certificate," is hereby amended by deleting the references contained
         therein to the Expiration Date of September 30, 2000, and inserting in
         its place the Expiration Date of September 30, 2010.

         4.       Exhibit B to the Rights Agreement, "Koger Equity, Inc. Summary
         of Common Stock Purchase Rights," is hereby amended by deleting the
         Expiration Date of September 30, 2000, contained in the second
         paragraph of that Exhibit and inserting in its place the Expiration
         Date of September 30, 2010.

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         5.       Except for the amendments set forth in paragraphs 1, 2, 3 and
         4 of this Agreement, all of the provisions, covenants, rights and
         obligations contained in the Amended Rights Agreement shall continue in
         full force and effect and be binding upon the parties hereto the same
         as though they were contained in this Agreement.

                  IN WITNESS WHEREOF, the parties hereto have caused this
         Agreement to be duly executed and set their respective hands and seals
         all as of the date and year first above written.

                                          KOGER EQUITY, INC.

                                          By: /s/ Robert E. Onisko
                                              ---------------------------------

                                              Its Chief Financial Officer

Attest:

By:  /s/ Mary H. McNeal
   ---------------------------------
   Title: Assistant Vice President

                                          WELLS FARGO BANK MINNESOTA, N.A.
                                          As Rights Agent

                                          By: /s/ Nancy Rosengren
                                              ---------------------------------
                                              Its Vice President

Attest:

By: /s/ Beverly A. Robinson
    ---------------------------------
    Title:   Assistant Vice President

                                       12<PAGE>   1

                                                                   EXHIBIT 4.1

<TABLE>
<S>                               <C>                                                                           <C>

         [NUMBER]                               SOUTHERN ENERGY, INC.                                                [SHARES]
SE                                         COMMON STOCK PAR VALUE $.01 EACH

INCORPORATED UNDER THE LAWS                                                                                      SEE REVERSE FOR
 OF THE STATE OF DELAWARE                                                                                        CERTAIN DEFINITIONS

                                                                                                                 CUSIP 842816100

THIS CERTIFIES THAT

is the owner of

                                       FULLY-PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK

                                                     COUNTERSIGNED AND REGISTERED

of Southern Energy, Inc. (hereinafter called the Corporation) transferable on the books of the Corporation by the holder hereof in
person or by duly authorized Attorney upon surrender of  this certificate properly endorsed. This certificate and the shares
represented hereby are issued and shall be held subject to all the provisions of  the Certificate of Incorporation and all
amendments thereto (copies of which are on file with the Transfer Agents) to all of which the holder by the acceptance hereof
assents. This certificate is not valid unless countersigned by a Transfer Agent and registered by a Reigistrar.

Witness the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.

Dated                                                                              Southern Energy, Inc.

/s/  Elizabeth B. Chandler                                                         By /s/ A.W. Dahlberg

VICE PRESIDENT AND SECRETARY
                                                                                   Chief Executive Officer

                                                                                       Transfer Agent
                                                                                        and Registrar

                                                                                    Authorized Signature
</TABLE>
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                             SOUTHERN ENERGY, INC.

         THE CORPORATION WILL FURNISH TO ANY SHAREHOLDER UPON REQUEST AND
WITHOUT CHARGE A FULL STATEMENT OF THE POWERS, DESIGNATIONS, PREFERENCES AND
RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH AUTHORIZED
CLASS OF STOCK OR SERIES THEREOF AND THE QUALIFICATIONS, LIMITATIONS OR
RESTRICTIONS OF SUCH PREFERENCES AND/OR RIGHTS, TO THE EXTENT THAT THE SAME HAVE
BEEN FIXED, AND OF THE AUTHORITY OF THE BOARD OF DIRECTORS TO DESIGNATE THE SAME
WITH RESPECT TO OTHER SERIES. SUCH REQUEST MAY BE MADE TO THE CORPORATION OR TO
ITS TRANSFER AGENT AND REGISTRAR.

        The following abbreviations, when used in the inscription on the face
of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
        <S>                                             <C>
        TEN COM -- as tenants in common                 UNIF GIFT MIN ACT -- _____________ Custodian ___________
        TEN ENT -- as tenants by the entireties                                 (Cust)                  (Minor)
        JT TEN  -- as joint tenants with right of                            under Uniform Gifts to Minors
                   survivorship and not as tenants                           Act __________________
                   in common                                                           (State)
</TABLE>

   Additional abbreviations may also be used though not in the above list.

For value received, __________________ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
   IDENTIFYING NUMBER OF ASSIGNEE
[                                    ]

________________________________________________________________________________
                  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS
                     INCLUDING POSTAL ZIP CODE OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________ Shares
of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint ____________________________________________,
Attorney to transfer the said stock on the books of the within-named
Corporation with full power of substitution in the premises.

Dated, ________________________

SIGNATURE GUARANTEE:

_______________________________      ___________________________________________

_______________________________      ___________________________________________
                                     Notice: The signature to this assignment
                                     must correspond with the name as written
                                     upon the face of the certificate in
                                     every particular, without alteration or
                                     enlargement, or any change whatever.

                                     SIGNATURE MUST BE GUARANTEED BY A
                                     QUALIFIED GUARANTOR

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