[Samba] Win2k clients problem after updating system

[Juanjo Lull ONO]

Hello all samba users and programmers,
Since I changed my system and reinstalled samba funny things happen in my net. I used to work with a Gentoo system and now I've got installed a Knoppix 3.2 Debian, but by now I don't think it's interesting for the problem I've got.
What I did was:
    - install samba 3.0.0-final
    - copy the old smb.conf file to the path in the new system
    - change smb.conf to be good for the new samba version (I think the old was 2.3)
    - copy the old smbusers and smbpasswd to the samba folder in the new installation.
Now the system is running BUT in my Win2k clients, some users can log in and others can't. And also the users who can login do not have the logon script exec'ed.
I have reinstalled one of the computers and IT WORKS. I mean that the logon script works and everybody can login.

Is there any way to recover the net without reinstalling all the clients? Has this anything to do with the PDC SID. Samba is the main PDC. This is smb.conf without the comment lines:

#============================ Global Definitions ==============================

[global]
  workgroup = MY_LAN
  netbios name = PENGUIN

  server string = Servidor SaMBa %v
  syslog = 0
  panic action = /usr/share/samba/panic-action %d

   printcap name = /etc/printcap.cups
   load printers = yes
   guest account = nobody
   printing = cups

   log file = /var/log/samba/log.%m

   max log size = 1000

   hosts allow = 192.168.0. 127.0.0.1

   security = user

  encrypt passwords = true
  smb passwd file = /etc/samba/smbpasswd

  username map = /etc/samba/smbusers

  socket options = TCP_NODELAY

   interfaces = 192.168.0.0/24

   local master = yes

   os level = 32

   domain master = yes 

   preferred master = yes

   domain logons = yes

   logon script = logon.bat

   logon path = 

logon drive = W:

   dns proxy = no 

   dos charset = CP850
   unix charset = ISO8859-15

#============================ Share Definitions ==============================
[homes]
   comment = Directorio Home
   browseable = no
   writable = yes
   path = /home/%U/samba
   valid users = %U
   create mask = 0700
   directory mask = 0700

[forall]
 comment = Directory for all
 browseable = yes
 writable = yes
 path = /home/forall
 public = yes
 force user = exper

[programas]
 comment = Programas utiles
 browseable = yes
 writable = no
 path = /progrs
 public = yes
 force user = exper

[progr_admin]
 comment = Programas para anyadir
 browseable = yes
 writeable = yes
 path = /progrs
 public = yes
 valid users = root

# Un-comment the following and create the netlogon directory for Domain Logons
[netlogon]
   comment = Network Logon Service
   path = /etc/samba
;   public = no
   guest ok = yes
   writable = no
   browsable = no
;   share modes = no

[printers]
   comment = All Printers
   path = /var/spool/cups/tmp
   browseable = no
# to allow user 'guest account' to print.
   guest ok = yes
   writable = no
   printable = yes
   create mode = 0700
[HPDeskjet]
   comment = Fred's Printer
#   valid users = fred
   path = /var/spool/cups/tmp
   printer = HPDeskjet840C
   browseable = no
   public = yes
#   writable = yes
   printable = yes

This is all. Remember that IT WORKED before canging the linux distro so it must be a problem with samba version migration OR with the clients (more easy to think about it...)
Finally the logs:
    - log.nmbd
[2004/01/11 19:17:27, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.11: code = 0x12
[2004/01/11 19:17:40, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.11: code = 0x12
[2004/01/11 19:17:40, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.11: code = 0x12
[2004/01/11 19:20:45, 1] nmbd/nmbd_processlogon.c:process_logon_packet(95)
  process_logon_packet: Logon from 192.168.0.11: code = 0x12
...
(allways the same error, no matter the computer: also the new one)

    - log.p1 (p1 one of the computers)
[2004/01/11 18:32:14, 0] smbd/service.c:make_connection(850)
  p1 (192.168.0.11) couldn't find service ::{2227a280-3aea-1069-a2de-08002b30309d}
[2004/01/11 18:32:24, 0] lib/smbrun.c:setup_out_fd(42)
  setup_out_fd: Failed to create file /tmp/smb.9RIQDx. (Permiso denegado)
[2004/01/11 18:32:34, 0] lib/smbrun.c:setup_out_fd(42)
  setup_out_fd: Failed to create file /tmp/smb.T2VSr1. (Permiso denegado)
[2004/01/11 18:32:44, 0] lib/smbrun.c:setup_out_fd(42)
  setup_out_fd: Failed to create file /tmp/smb.PYAIEu. (Permiso denegado)
[2004/01/11 18:32:54, 0] lib/smbrun.c:setup_out_fd(42)
  setup_out_fd: Failed to create file /tmp/smb.JCJQ8v. (Permiso denegado)
[2004/01/11 18:33:04, 0] lib/smbrun.c:setup_out_fd(42)
  setup_out_fd: Failed to create file /tmp/smb.xqtCye. (Permiso denegado)
[2004/01/11 18:33:22, 0] smbd/connection.c:register_message_flags(220)
  register_message_flags: tdb_fetch failed

OK. Here you see couldn't find service ... maybe that's the big and real problem...
Thanx in advance. I hope I've given enough info (at least I've given a great amount!)