[Samba] trust relationship between this workstation and the primary domain failed

[clinton propst]

Samba shares work for windows 7 and Server 2008, but XP and Server 2000 recieve the following error when trying to map samba shares:

"The trust relationship between this workstation and the primary domain failed."

tail -f /var/log/messages
Apr 10 07:38:03 samba01 smbd[23581]:   connect_to_domain_password_server: unable to open the domain client session to machine ad1.strat.com. Error was : NT_STATUS_ACCESS_DENIED.
Apr 10 07:38:03 samba01 smbd[23581]: [2012/04/10 07:38:03.788387,  0] rpc_client/cli_pipe.c:4163(cli_rpc_pipe_open_schannel)
Apr 10 07:38:03 samba01 smbd[23581]:   cli_rpc_pipe_open_schannel: failed to get schannel session key from server ad1.strat.com for domain ARN.
Apr 10 07:38:03 samba01 smbd[23581]: [2012/04/10 07:38:03.788601,  0] auth/auth_domain.c:188(connect_to_domain_password_server)
Apr 10 07:38:03 samba01 smbd[23581]:   connect_to_domain_password_server: unable to open the domain client session to machine ad1.strat.com. Error was : NT_STATUS_ACCESS_DENIED.
Apr 10 07:38:03 samba01 smbd[23581]: [2012/04/10 07:38:03.789152,  0] auth/auth_domain.c:289(domain_client_validate) Apr 10 07:38:03 samba01 smbd[23581]:   domain_client_validate: Domain password server not available

Samba 3.5.10
RHEL 6.2

Any help is appreciated.  
Thanks,
Clinton