How did you try it?

C:\SCRIPTS\KIX32.EXE TEST.KIX /F


IF INGROUP('YourDomainName\YourGroupName')
  ? 'Well.. what do you know, I am in the group' +@ERROR +' : '+@SERROR
ELSE
  ? 'Well.. what do you know, Im not in the group' +@ERROR +' : '+@SERROR
ENDIF


Please try the above code and let us know what was returned.

We have a James F. Spadaro here at work, was wondering if it was you or not.

I have a Security Group OU as well, and the above code works fine for me.

Also check which DC authenticated you, then connect to that AD Controller with Active Directory Users and Computers and VERIFY that the user/group is on that DC as well. Maybe some issue with replication.