samba - Sep 2002 - New Users cannot access Unix server after Samba 2.2.5 Upgrade

Please bear with me since I am new to the world of Samba.  We are currently
running an NT Domain with an NT Server doing authentications.  After an
upgrade to Samba 2.2.5  any new users created can not access the the UNIX
server behind Samba.  pre existing user created prior to the upgrade are
seen fine but new users try to access the server and are greeted by a login
screen that no login info will allow you past.  If anyone has seen this
problem and solved it please let me know.  This situation is quickly
becomming critical.

Thanks,
            Tom Davenport