problem login to windows 2003 server r2 with sp2

Hi. I a new member and i have a problem with a virtualization. More exactly:
I put in a pc windows 2003 server and VMWare Workstation. After that i put a win xp pro and a windows 2003 (3 in total, 2 virtual and 1 real).
The host and the win xp are user of a domain of the virtual 2003 ( this have a dns server installed). The users no problems but the dc when login cant do and show this error:
Security Manager not initialization cuz the System ID structure is invalid.

Any sugestions?