I promise...I have read every post involving this topic and cannot get anything to work. I've been using Kixtart for years with no issue...I have depended heavily on the INGROUP function to do various things.

2008 R2 Active Directory
KIX 4.62
XP clients work just fine as they always have
Win7 SP1 clients do not.
Win7 32 bit and 64 bit exhibit same behaviour

if ingroup("XYZ") = 1
? "Member of group!"
endif

The above script does not display anything
The user in question belongs to the group
User has logged off and back on
I have flushed the cache both with /f and by deleting the registry key "TokenCache"
I have tried to apply the hotfix 976494 but I get a message saying it does not apply (I assume because I am on SP1)
I do NOT get the 1789 error in event log

I have run out of things to try...has anybody successfully gotten this to work *in today's environment*? (Meaning a fully patched and up to date Win7 SP1 client on 2008 AD.)