[Samba] Samba 3.0.22 disconnects workstations

[Luis Daniel Lucio Quiroz]

Hi list,

We have implemented in a mediu size network (8 classes C) a PDC and BDC with 
samba.  All works okay, but there are some issues.  Workstation disconect 
form domain after a while of working (no matters if there is activity or 
not).

ON PDC, syslogs says
[2006/10/13 14:33:38, 1] lib/smbldap.c:another_ldap_try(1051) 
  Connection to LDAP server failed for the 14 try! 
[2006/10/13 14:33:39, 1] lib/smbldap.c:another_ldap_try(1051) 
  Connection to LDAP server failed for the 15 try! 
[2006/10/13 14:33:40, 0] passdb/pdb_ldap.c:ldapsam_search_one_group(2170) 
  ldapsam_search_one_group: Problem during the LDAP search: LDAP error: 
(unknown) (Time limit exceed
esto lo veo en el esclavo despues de reiniciar la machine
mira este
[2006/10/13 13:45:41, 0] rpc_server/srv_netlog_nt.c:_net_auth_2(409) 
  _net_auth2: failed to get machine password for account CARIBE$

On BDC:
[2006/10/13 12:05:56, 0] lib/util_sock.c:write_data(557) 
  write_data: write failure in writing to client 10.160.252.206. Error 
Connection reset by peer 
[2006/10/13 12:05:56, 0] lib/util_sock.c:Send_smb(765) 
  Error writing 4 bytes to client. -1. (Connection reset by peer) 

could any body help me, regards.