moving to ACCESS2003 with IE 6.0.2900 - WININET stops working

I have an existing ACCESS 97 application with WININET HTTP functions (IE
6.0.2800.1106) which have stopped working with the move of the application to
ACCESS 2003, under Windows XP using IE 6.2900.2180. There is nothing is
being processed by the ASP which receives the HttpSendRequest.
I have put DEBUG.PRINT statements in my ACCESS WININET module to help me
understand what is happening to the HTTP calls. I have run in both
environments and compared the results.
The one difference I can see is on the HttpQueryInfo return. I have made
the QueryInfo call using Content_Length, Status_Code and Status_Denied. On
my working application I always get a Status code return of 200 (OK). But on
the failing application I always get a return of zero. I cannot find this
zero status code in the reference material on WININET, which I have consulted
to help resolve this problem, so I am stuck.

I am a beginner at Internet programming and have inherited this application
from someone who has now left our company. Has anyone out there got any
advice for me