[Samba] Samba Login Problem on Windows

[justStormY]

Hi,

I have a problem of using samba on a windows xp client. When i'll try to 
connect to the domain and create a machine account all works. But when 
i'm rebooting the system and try to logon there appears an error.
log.smbd tells me the following error: sambatest has user sid 
S-1-5-21-............................(the dots are for the long code ;)) 
but group sid S-1-5-21-...................................................
The conflicting domain portions are not supported for NETLOGON calls.

So then i'll tryed "net groupmap lits | sort" and that tells me of 4 
Domain Admins, 4 Domain Guests and 4 Domain Users. But only one of ones 
will be rooted to linux groups root,users,nobody...
I think there is the mistake or?
But how can i remove the 3 not-important entrys or how to edit the 
/var/lib/samba/group_mapping.tdb

Or is it a other error and not theese what i mean?

I'm really happy about fast help, cause it's really important to me.

Thank's Markus Humm