samba pdc

[Tsung Ching]

i had set up a samba pdc under FreeBSD, and  used /usr/ports to install
samba.
i can join my windows xp client into the domain, but i can't logon the
domain by samba users.

smb.conf as followed
================================
[global]
        client code page = 950
        workgroup = TCLINDOMAIN
        netbios name = VMWARE
        server string =
        encrypt passwords = Yes
        update encrypted = Yes
        passwd program = /usr/bin/passwd %u
        log level = 3
        syslog = 3
        log file = /var/log/log.%m
        domain admin group = root, @wheel
        add user script = /home/netlogon/scripts/smbaddmachine %u
        delete user script = /usr/sbin/rmuser -y %u
        logon script = scripts\default.bat
        domain logons = Yes
        os level = 65
        valid users = root, @wheel, @smbusers
        admin users = root, tclin, @wheel

[homes]
        read only = No
        create mask = 0700
        directory mask = 0700
        locking = No
        oplocks = No

[netlogon]
        path = /home/netlogon
==================================

i had set the registry key 'RequireSignOrSeal' with value 0
when i was trying to logon, it showed a messagebox to inform me that it
can't connect to domain controller or
machine account doesn't exist....

by the way, smbaddmachine is a program i wrote using C language, it can add
a user account or machine account into /etc/master.passwd.
thank for you help... :)
                                                            tsung ching