samba - Nov 2007 - problem with SAMBA as PDC

Hi list,
I am configuring a samba server as a PDC (called DSERVER). I have follow 
some good docs to build my smb.conf file (see below).
However, my server does not works correctly: when I execute smbclient, I 
don't find my workgroup (SOCINFO) alghouth I activated the wins support.
[adel@grid007 ~]$ smbclient -L localhost -U root
Password:
Domain=[DSERVER] OS=[Unix] Server=[Samba 3.0.26a-0.fc7]

        Sharename       Type      Comment
        ---------       ----      -------
        IPC$            IPC       IPC Service (serveur samba 3.0.26a-0.fc7)
        samsungDI       Printer   samsungDI
        epson           Printer   epson
        root            Disk      Repertoire personnel
Domain=[DSERVER] OS=[Unix] Server=[Samba 3.0.26a-0.fc7]

        Server               Comment
        ---------            -------

        Workgroup            Master
        ---------            -------
        UTICD                PCADEL

Can  someone  help me please.
Regards
Adel

[global]
        workgroup = SOCINFO
        netbios name = DSERVER
        server string = serveur samba %v
        interfaces = eth0:0, 127.0.0.1
        log level = 2
        log file = /var/log/samba/log.%m
        max log size = 50
        logon script = netlogon.bat
        logon path = \\%L\profiles\%U
        logon drive = H:
        os level = 65
        preferred master = Yes
        domain master = Yes
        name resolve order = wins bcast hosts
        wins support = Yes

[homes]
        comment = Repertoire personnel
        read only = No
        browseable = No

[profiles]
        path = /home/samba/profiles
        read only = No
        create mask = 0600
        directory mask = 0700
        browseable = No

[netlogon]
        path = /home/netlogon
        browseable = No

[printers]
        comment = All Printers
        path = /var/spool/samba
        printable = Yes
        browseable = No