samba - Jul 2004 - can't join a w2k workstation on samba

hi *

i just set up samba and it seems to working right while connecting from
an win98 workstation to the server. login is passed correctly and all
shares are shown.

When i connect from a w2k workstation to the server, i also could see
all shares while i'm logged in localy by an existing user. When i try
to set up domain-login i get an error like:"named domain does not exist
or no connection could be established" (translated from german)

my question
does anybody of you know what could be going wrong?

here is my smb.conf

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server:/# cat /etc/samba/smb.conf
# Samba config file created using SWAT
# from 192.168.1.100 (192.168.1.100)
# Date: 2004/07/24 17:53:43

# Global parameters
[global]
        workgroup = E1P
        server string = Datei- und Programm-Server
        obey pam restrictions = Yes
        passwd program = /usr/bin/passwd %u
        passwd chat = *Enter\snew\sUNIX\spassword:* %n\n
*Retype\snew\sUNIX\spassword:* %n\n .
        username map = /etc/samba/smbusers
        unix password sync = Yes
        log level = 10
        syslog = 0
        log file = /var/log/samba/log.%m
        max log size = 1000
        load printers = No
        machine password timeout = 86400
        add machine script = /usr/sbin/useradd -d /dev/null -g 100 -s
/bin/false -M %u
        domain logons = Yes
        os level = 65
        preferred master = Yes
        domain master = Yes
        wins support = Yes
        ldap ssl = no
        panic action = /usr/share/samba/panic-action %d
        admin users = root, ahornig
        case sensitive = Yes

[homes]
        comment = Privatverzeichnis
        read only = No
        case sensitive = No
        browseable = No

[printers]
        comment = All Printers
        path = /tmp
        create mask = 0700
        printable = Yes
        browseable = No

[print$]
        comment = Printer Drivers
        path = /var/lib/samba/printers

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any possible ideas are welcome

andreas