samba - Jul 2006 - NBNS registration issue : no response, invalid request format

I try to join a Win 2K machine to my samba 3.0.22 domain.
The server must act as a PDC.
shares are working correctly, and every troubleshooting steps from 
chapter 37 from the Samba HOWTO guide also.
I have some trouble :

Here is the log from  nmbd.log of what I think is th request send when 
trying to join the domain (DIAMOND is the name of my 
domain,192.168.2.150 is the IP address of the client and 192.168.2.138 
is the IP address of the samba server)
[2006/06/28 09:47:40, 3] 
nmbd/nmbd_incomingrequests.c:process_name_query_request(454)
  process_name_query_request: Name query from 192.168.2.150 on subnet 
192.168.2.138 for name DIAMOND<1c>

I see also in the log the following message (CETIC1 is the name of the 
workgroup)
[2006/06/28 09:55:08, 0] 
nmbd/nmbd_incomingrequests.c:process_name_refresh_request(172)
  process_name_refresh_request: unicast name registration request 
received for name CETIC1<00> from IP 192.168.2.150 on subnet
UNICAST_SUBNET.
[2006/06/28 09:55:08, 0] 
nmbd/nmbd_incomingrequests.c:process_name_refresh_request(173)
  Error - should be sent to WINS server

The server has several interfaces. The test machine is on connected on 
one of the NIC (subnet 192.168.2.0/24)
and the server is connected to the whole LAN with the other NIC (subnet 
192.168.0.0/24)
On the whole LAN ,there is a Win 2K PDC and a Samba server acting as a 
domain member of the domain CETIC

What am I doing wrong ?


Here is my smb.conf
#======================= Global Settings ======================
[global]

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
   workgroup = cetic1
   netbios name = DIAMOND
#   server string = TEST Server
   log level = 3
   os level = 65

   bind interfaces only = yes
   interfaces = eth2
# server string is the equivalent of the NT Description field
   server string = %h server (Samba %v)

# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS Server
   wins support = yes

# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
;   wins server = 192.168.0.201

# If we receive WINS server info from DHCP, override the options above.
#   include = /etc/samba/dhcp.conf

# This will prevent nmbd to search for NetBIOS names through DNS.
   dns proxy = no

# What naming service and in what order should we use to resolve host names
# to IP addresses
   name resolve order = wins host lmhosts bcast

    username map = /etc/samba/smbusers
#    winbind use default domain = Yes
    utmp = Yes
    time server = yes

#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Put a capping on the size of the log files (in Kb).
   max log size = 1000

# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
   syslog only = no

# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
   syslog = 0

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d


####### Authentication #######

# "security = user" is always a good idea. This will require a Unix
account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/ServerType.html in the samba-doc
# package for details.
   security = user

# You may wish to use password encryption.  See the section on
# 'encrypt passwords' in the smb.conf(5) manpage before enabling.
   encrypt passwords = true

# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
   passdb backend = tdbsam:/var/lib/samba/passdb.tdb guest

;   obey pam restrictions = yes

;   guest account = nobody
;   invalid users = root

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
   unix password sync = yes

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Augustin Luton 
<aluton@hybrigenics.fr> for
# sending the correct chat script for the passwd program in Debian Potato).
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\sUNIX\spassword:* %n\n 
*Retype\snew\sUNIX\spassword:* %n\n .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
;   pam password change = no


########## Printing ##########

# If you want to automatically load your printer list rather
# than setting them up individually then you'll need this
;   load printers = yes

# lpr(ng) printing. You may wish to override the location of the
# printcap file
;   printing = bsd
;   printcap name = /etc/printcap

# CUPS printing.  See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
;   printing = cups
;   printcap name = cups

# When using [print$], root is implicitly a 'printer admin', but you can
# also give this right to other users to add drivers and set printer
# properties
;   printer admin = @ntadmin


######## File sharing ########

# Name mangling options
;   preserve case = yes
;   short preserve case = yes


############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m

# Most people will find that this option gives better performance.
# See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/speed.html
# for details
# You may want to add the following on a Linux system:
#         SO_RCVBUF=8192 SO_SNDBUF=8192
   socket options = TCP_NODELAY

# The following parameter is useful only if you have the linpopup package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
;   message command = /bin/sh -c '/usr/bin/linpopup "%f"
"%m" %s; rm %s' &

# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to 'no'; otherwise, the default behavior is recommended.
   domain master = yes
    domain logons = Yes
    preferred master = Yes
    logon path = \\%N\profiles\%U
    logon drive = H:
    logon home = \\debdell\%U\winprofile
    logon script = logon.cmd

# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
#   idmap uid = 10000-20000
#   idmap gid = 10000-20000
#   template shell = /bin/bash

#======================= Share Definitions ======================
[homes]
   comment = Home Directories
   browseable = no

# By default, the home directories are exported read-only. Change next
# parameter to 'yes' if you want to be able to write to them.
   writable = no

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
   create mask = 0700

# Directory creation mask is set to 0700 for security reasons. If you 
want to
# create dirs. with group=rw permissions, set next parameter to 0775.
   directory mask = 0700

# Un-comment the following and create the netlogon directory for Domain 
Logons
# (you need to configure Samba to act as a domain controller too.)
[netlogon]
   comment = Network Logon Service
   path = /home/samba/netlogon
   guest ok = yes
   writable = no
   share modes = no

[PROFILES]
   comment = Samba server's profile directory
   read only = no
   writable = yes
   path = /var/lib/samba/profiles
   create mask = 0600
   directory mask = 0700

[printers]
   comment = All Printers
   browseable = no
   path = /tmp
   printable = yes
   public = no
   writable = no
   create mode = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
   comment = Printer Drivers
   path = /var/lib/samba/printers
   browseable = yes
   read only = yes
   guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# Replace 'ntadmin' with the name of the group your admin users are
# members of.
;   write list = root, @ntadmin

# A sample share for sharing your CD-ROM with others.
;[cdrom]
;   comment = Samba server's CD-ROM
;   writable = no
;   locking = no
;   path = /cdrom
;   public = yes
[public]
   comment = Samba server's public directory
   writable = yes
   locking = no
   path = /var/lib/samba/public
   public = yes

# The next two parameters show how to auto-mount a CD-ROM when the
#       cdrom share is accesed. For this to work /etc/fstab must contain
#       an entry like this:
#
#       /dev/scd0   /cdrom  iso9660 defaults,noauto,ro,user   0 0
#
# The CD-ROM gets unmounted automatically after the connection to the
#
# If you don't want to use auto-mounting/unmounting make sure the CD
#       is mounted on /cdrom
#
;   preexec = /bin/mount /cdrom
;   postexec = /bin/umount /cdrom