samba - Feb 2006 - authentication error after primary group change

Hello guys!

I have a problem. After changing the primary group of my users, samba don't
recognize them anymore.
Am I supposed to exclude and reinclude everyone via pdbedit?
Is there another way to rebuild the base without having so pain?
My machine is a FreeBSD and samba version 3.0.21a.
Global conf:

[global]

   workgroup = SKYLAB
   netbios name = maryeva
   server string = Samba PDC-Server
   passdb backend = tdbsam

   load printers = yes
   printcap name = cups
   printing = cups

   guest account = pcguest

   log file = /export/samba/logs/smb.log
   max log size = 1GB
   log level = 1

   security = user
   admin users = root
   encrypt passwords = yes
   pam password change = yes

   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192

   local master = yes
   os level = 99
   domain master = yes
   preferred master = yes
   domain logons = yes


   logon path = \\%L\profiles\%U
   logon drive = X:
   logon home = \\%L\%U\.profile
   logon script = %S.bat
   wins support = yes


Thanks!

--------------------
J?nior C?sar Rosante
Adm. Redes
STI - Unesp - Tup?
14-3404.4200