[Samba] Samba PDC setting up user groups and policies (Help)

[RIVERA,ALEXANDER]

I have a Samba PDC, and have problems setting up user 
groups to limit activity and access to file folders in 
Windows XP. I have administrative users that work fine. 
New users added as power users or regular users can log 
into machine client but dont even have access to the local 
C: drive. Cant change backgrounds or even unlock the 
taskbar. As long as they are added as user to the machine 
with admin priveleges or added to admin group the account 
works fine.