samba - Jan 2003 - No domainserver found

I am trying to configure Samba 2.2.7 as a PDC on a Mandrake 9.0 box,
mainly 
serving Win ME clients.
Every time I try to logon to my domain, I get something in the line 
of(Translated from danish): "No domainserver found. Windows cannot blah
blah 
blah..."
However, once logged in to Windows, I can access my home and shares, and
the 
server shows up in the Network neighbourhood.
Both the user and the client-box is registered as samba-users.

WHY CAN'T WINDOWS FIND THE DANM DOMAINSERVER??

My smb.conf goes:

# Samba config file created using SWAT
# from 0.0.0.0 (0.0.0.0)
# Date: 2003/01/22 11:51:20

# Global parameters
[global]
        workgroup = ES-NET
        netbios name = ES-SERVER
        server string = Ejstrupholm skoles sambaserver
        encrypt passwords = Yes
        log file = /var/log/samba/log.%m
        max log size = 50
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        printcap name = lpstat
        logon home = \\ES-SERVER\%u
        domain logons = Yes
        os level = 34
        preferred master = Yes
        domain master = Yes
        dns proxy = No
        wins support = Yes
        default service = global
        hosts allow = localhost, all
        printing = cups

[homes]
        comment = Home Directories
        path = %H
        valid users = %S
        read only = No
        create mask = 0600
        directory mask = 0700
        browseable = No

[printers]
        comment = All Printers
        path = /var/spool/samba
        create mask = 0700
        guest ok = Yes
        printable = Yes
        print command = lpr-cups -P %p -o raw %s -r   # using client side 
printer 
drivers.
        browseable = No

[print$]
        path = /var/lib/samba/printers
        write list = @adm root

[pdf-generator]
        comment = PDF Generator (only valid users)
        path = /var/tmp
        printable = Yes
        print command = /usr/share/samba/scripts/print-pdf %s ~%u 
\\\\\\\\%L\\\\%u %m 
%I &

[Fdrev]
        comment = F-drev p? ES-sambaserveren
        path = /F-drev
        read only = No
        guest ok = Yes

[cdimages]
        comment = All shared CD images
        path = /mnt/iso
        guest ok = Yes

[netlogon]

are the clients all pointing at the samba server for wins?
>         wins support = Yes
brad

Currently, I am just trying to set up one client, and this client points
to the samba server as wins-server.
As far as I have understood, the samba server must be a wins server, if no
other wins-servers are avaliable.
Does it corrupt the system if other clients point elsewhere?
No other computers on my network are designated wins-servers, but - since
the network is in a school - the network is a part of a larger, public(as
in owned and driven by the local township) network, I am not shure what
the hell is out there??

Bendt Rasmussen