<page>                                          EXHIBIT 31.02
CERTIFICATIONS

I, Lee Horwitz, Chief Financial Officer of Demeter Management
Corporation (?Demeter?), the general partner of the registrant,
Dean Witter Diversified Futures Fund II L.P., certify that:

1.	I have reviewed this quarterly report on Form 10-Q of the
registrant;

2.	Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the
circumstances under which such statements were made, not
misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other
financial information included in this report, fairly present
in all material respects the financial condition, results of
operations and cash flows of the registrant as of, and for,
the periods presented in this report;

4.	The registrant?s other certifying officer and I are
responsible for establishing and maintaining disclosure
controls and procedures (as defined in Exchange Act Rules 13a-
15(e) and 15d-15(e)) and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

a)	Designed such disclosure controls and procedures, or caused
such disclosure controls and procedures to be designed
under our supervision, to ensure that material information
relating to the registrant, including its consolidated
subsidiaries, is made known to us by others within those
entities, particularly during the period in which this
report is being prepared;

b)	Designed such internal control over financial reporting, or
caused such internal control over financial reporting to be
designed under our supervision, to provide reasonable
assurance regarding the reliability of financial reporting
and the preparation of financial statements for external
purposes in accordance with generally accepted accounting
principles;

c)	Evaluated the effectiveness of the registrant?s disclosure
controls and procedures and presented in this report our
conclusions about the effectiveness of the disclosure
controls and procedures, as of the end of the period
covered by this report based on such evaluation; and


<page>
d)	Disclosed in this report any change in the registrant?s
internal control over financial reporting that occurred
during the registrant?s most recent fiscal quarter (the
registrant?s fourth fiscal quarter in the case of an annual
report) that has materially affected, or is reasonably
likely to materially affect, the registrant?s internal
control over financial reporting; and

5.	The registrant?s other certifying officer and I have
disclosed, based on our most recent evaluation of internal
control over financial reporting, to the registrant?s auditors
and the audit committee of Demeter?s board of directors (or
persons performing the equivalent functions):

a)	All significant deficiencies and material weaknesses in the
design or operation of internal control over financial
reporting which are reasonably likely to adversely affect
the registrant?s ability to record, process, summarize and
report financial information; and

b)	Any fraud, whether or not material, that involves
management or other employees who have a significant role
in the registrant?s internal control over financial
reporting.





Date: November 14, 2006   BY: /s/ Lee Horwitz
                                  Lee Horwitz
                                  Chief Financial Officer,
                                  Demeter Management Corporation,
                                  general partner of the registrant



<page>	EXHIBIT 32.01


CERTIFICATION OF PRESIDENT PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002




In connection with the Quarterly Report of Dean Witter Diversified
Futures Fund II L.P. (the ?Partnership?) on Form 10-Q for the
quarter ended September 30, 2006 as filed with the Securities and
Exchange Commission on the date hereof (the ?Report?), I, Walter
Davis, President of Demeter Management Corporation, the general
partner of the Partnership, certify, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, that, to the best of my knowledge:
(1)	The Report fully complies with the requirements of Section
13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2)	The information contained in the Report fairly presents,
in all material respects, the financial condition and
results of operations of the Partnership.









By:	  /s/	Walter Davis

Name:		Walter Davis
Title:	President of Demeter Management Corporation,
			the general partner of the Partnership

Date:		November 14, 2006


	<page>			EXHIBIT 32.02


CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002




In connection with the Quarterly Report of Dean Witter Diversified
Futures Fund II L.P. (the ?Partnership?) on Form 10-Q for the
quarter ended September 30, 2006 as filed with the Securities and
Exchange Commission on the date hereof (the ?Report?), I, Lee
Horwitz, Chief Financial Officer of Demeter Management
Corporation, the general partner of the Partnership, certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that, to the best of my
knowledge:
(1)	The Report fully complies with the requirements of Section
13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2)	The information contained in the Report fairly presents,
in all material respects, the financial condition and
results of operations of the Partnership.









By:  /s/Lee Horwitz

Name:	   Lee Horwitz
Title:  Chief Financial Officer of Demeter Management Corporation,
		   the general partner of the Partnership

Date:   November 14, 2006