I am trying to add a 2008 server to the domain ruunning on NW65 SP8

All my 2000, XP, Server 2003 systems can join without any problem

I can browse to the CIFS server from the 2008 server (made the change
to the Local Securities setting - priompt for user id and password -
can see all the shares defined - works great)

When I try to join the domin, I get the message : "the specified domin
does not exist or could not be contacted.