samba - Aug 2003 - Joining a domain with XP

Hi,

I  need help to make a WIN XP to join a samba domain running on samba
2.2.8a(or possible to run on 3beta).

Everytime i try to make it join the message says that i must be sure if it's
a Netbios domain name or dns based domain named.

Here it's a netbios domain name with a WINS server running on samba.

Thanks