[Samba] Newbie/Unable to join my new Domain

[Warren Green]

Hi, sorry if this question is worn out but I have set up a machine running 
Fedora core 1 with samba 3 and am trying to make my Samba the PDC I can 
see my domain GREENTEST from my network places but I am having a problem 
joining the domain.
I am sure I am missing something from the security side. Could someone 
please help.

This is my smb.conf file.

[global]
        workgroup = GREENTEST
        server string = Samba Server
        username map = /etc/samba/smbusers
        log file = /var/log/samba/%m.log
        max log size = 50
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        logon path = \\%L\Profiles\%U
        domain logons = Yes
        preferred master = Yes
        domain master = Yes
        dns proxy = No

[homes]
        comment = Home Directories
        read only = No
        browseable = No

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


Thanx
Warren