[Samba] Linux Primary Domain Controller Authentication

[Cynthia Jeness]

I have setup my Linux server as a Primary Domain Controller using Samba 
3.   All other computers on the network run various versions of Windows 
from 95 to XP.   All computers are able to join my Samba domain and the 
user computers can log onto the network.   However, if they try to 
access a file resource on one of the Windows 2003 file servers, the 
authentication fails with System Error 1789.   The Windows 2003 file 
server did successfully join my domain.    I am not running Winbindd 
primarily because it was not part of the Samba packaging provided by 
Suse.   Is it necessary to run Winbindd in order to have the Windows 
2003 servers validate?

Any suggestions would be greatly appreciated.

Cynthia Jeness