[Samba] Another problem with Win2k logins...

[Juanjo Lull ONO]

Hi all,
After recovering the former SID that I hadn't had in mind while changing the Linux distro (thanks to Thomas for his help), now I still have some problems. I can't still get any user to login but the ones that must be in cache in the clients (thanks again Thomas).
So, I'll give you the logs to see if anybody detects something strange...
The users can perform a 'smbclient -L PDCname -U username' but they cannot still login in their machines.
As the network is not so big (4 computers x 20 users), I'd have to change around 100 registry entries if I don't find a solution, but I still would like to know what's going on...
###############    log.p3 (one of the clients)  #########
[2004/01/12 23:29:04, 1] smbd/service.c:close_cnum(880)
  p3 (192.168.0.183) closed connection to service jlull
[2004/01/12 23:29:10, 0] rpc_server/srv_pipe.c:api_pipe_netsec_process(1357)
  failed to decode PDU
[2004/01/12 23:29:10, 0] rpc_server/srv_pipe_hnd.c:process_request_pdu(605)
  process_request_pdu: failed to do schannel processing.
[2004/01/12 23:29:23, 1] smbd/service.c:make_connection_snum(698)
  p3 (192.168.0.183) connect to service jlull initially as user jlull (uid=1006,
 gid=408) (pid 16244)
[2004/01/12 23:29:33, 1] smbd/service.c:make_connection_snum(698)
  p3 (192.168.0.183) connect to service jlull initially as user jlull (uid=1006,
 gid=408) (pid 16244)
[2004/01/12 23:31:00, 1] smbd/service.c:close_cnum(880)
  p3 (192.168.0.183) closed connection to service jlull

##########        log.nmbd     ##########
[2004/01/12 23:37:53, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.13: code = 0x12
[2004/01/12 23:43:51, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.13: code = 0x12
[2004/01/12 23:43:51, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.13: code = 0x12
[2004/01/12 23:44:23, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.14: code = 0x12
[2004/01/12 23:44:23, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.14: code = 0x12

Here 192.168.0.13 is the client from where I am logged (with a cached user) and 192.168.0.14 is another client that has generated that 0x12 code without anything more that being on (I mean, no user trying to log). It's all the time generating that code = 0x12...
Any idea?