[Samba] Trusted domain Authentication

[fakemail]

I've a problem with trusting domain authentication , I've searched the
newsgroup but found no answer .
The configuration is very simple .
A windows 2000 domain (DOMA) , which contains the samba server , and a
Windows 2003 domain (DOMB). The two are trusted by a bidirectional trust .

The problem is that users from the 2003 domain can't get authenticated by
the samba server and are prompted for user and password.
The log


[2004/09/01 10:48:57, 0] rpc_client/cli_netlogon.c:(406)
  cli_net_sam_logon_internal: NT code 0x00000001
[2004/09/01 10:48:57, 0] smbd/password.c:(1618)
  domain_client_validate: unable to validate password for user SA1726 in
domain DOMB  to Domain controller srvdom4. Error was NT code 0x00000001.
[2004/09/01 10:48:57, 1] smbd/reply.c:(1001)
  Rejecting user 'SIGE': authentication failed