samba - Aug 2002 - samba 2.2.3a multiples errors with a w2k +SP3

Here is a resume of the log:

[2002/08/25 20:28:03, 0] rpc_server/srv_pipe.c:api_rpcTNP(1200)
  api_rpcTNP: api_netlog_rpc: NET_SAMLOGON failed.
[2002/08/25 21:23:07, 0] rpc_server/srv_netlog.c:api_net_sam_logon(206)
  api_net_sam_logon: Failed to marshall NET_R_SAM_LOGON.

and this is other error:

[2002/08/25 22:12:13, 0] smbd/oplock.c:process_local_message(381)
  process_local_message: unknown UDP message command code (5dcf) - 
ignoring.
[2002/08/25 22:12:13, 0] smbd/oplock.c:process_local_message(381)
  process_local_message: unknown UDP message command code (5dcf) - 
ignoring.

and other:

[2002/08/26 21:53:34, 0] 
rpc_client/cli_spoolss_notify.c:spoolss_connect_to_client(109)
  connect_to_client: machine NT2000 rejected the tconX on the IPC$ share. 
Error was : NT_STATUS_ACCESS_DENIED.


What are this errors? 
Are they fixed in the new releases? 
I have problems with roaming profiles, is anyone of this problems the
reason?