[Samba] Trouble migrating user accounts from NT4 to SAMBA 3.0.1 using "net vampire"

[Jimmy Madden]

I'm having trouble migrating user account info from NT4 PDC to SAMBA
3.0.1 BDC (running on RedHat 8.0) using the "net rpc vampire" command.  
Not all of the accounts
will migrate.  I cannot see any difference bettween the ones that work
and the ones that don't.  The ones that do NOT work give this message
while running the vampire command:

Creating account: hbrendan
[2004/01/21 18:56:26, 0] passdb/pdb_smbpasswd.c:build_smb_pass(1150)
   build_sam_pass: Failing attempt to store user with non-uid based user 
RID

About 40% of the accounts are created properly in /etc/samba/smbpasswd, 
although all of them
are created properly in /etc/passwd.  I'm using the smbpasswd backend.

I've spent a week trying  to find the answer to this puzzle with no 
success at all.  Can someone give me even a little guidance?

Thanks,
   Jimmy Madden
   jmadden at knology.net