samba - Apr 2003 - Samba & Ldap Groups

I'm using samba 2.2.8a and redhat 2.1As with openldap and idealix from
smb tools.

 

Now i have created all groups and users but when i try to add user to
Admin's group 
all goes OK but then i log with the sam user on WinXP  pc and try to
change pc's name
it says that i don't have admin rights. No I try to log to winNT PDC
with user that have admin
rights all works ok.

 

Now i don't know what must i do so that groups will work.

 

 

Regards, Milos