Samba as PDC using Ubuntu or Debian

[macaruchi]

Hi! I am using the article:
SAMBA (Domain Controller) Server For Small Workgroups With Ubuntu 5.10 "Breezy Badger"
and I did everything as cut adn paste but when I try the create the Tom' s account example I get this:

tdb_update_sam: Failing to store a SAM_ACCOUNT for [tom] without a primary group RID
Failed to add entry for user tom.
Failed to modify password entry for user tom

I read that this problem was caused for the name in smb.conf and hostname was different but If I did all steps like "cut and paste" I modiifed the hostname.

I ran the commando pdbedit -Lv and the domain that appear here is internet the old name of my server but tom user it is not here.The new name is SERVER1 like article.

What must change to can create my account and run my Samba PDC?

TIA

Edwin Quijada