Apache 2.0 Proxy & Windows Update

I'm not a developer but am in desperate need of some help for the Apache 
2.0 proxy mod.  I've been running it on 2.0.43 (and just tried 2.0.44 
with the same result) and I keep getting errors when my users try to 
access http://windowsupdate.microsoft.com/ .  It says and error has 
occured and won't let you update your computer.  I installed the Apache 
1.3 on the same box with the same options and it works just fine so it's 
isolated to 2.0.  Does anyone have any suggestions or help?  I would 
really appreciate any assistance.

Sincerely,
Jay W. Reffner
Network Systems Manager
The University of Findlay