[Samba] Problem with Samba as PDC

[P-G Fahrbring]

I've download a PDC guide from IBM's website, 
https://www6.software.ibm.com/dw/education/esdd/samba/?x=50&y=6.

I've follow the description line by line, but I can't join the domain 
from a windows Xp professional computer.

Windows Xp answer with following error message...
"Can't connect to a domain controller for the domain Fah-Technet"

I can ping the computer running Samba with IP-address from Windows Xp, 
but not with netbiosname (LinuxRH9.Fah-Technet)
I can also mount a shared disk from Windows Xp (mount -t smbfs -o 
username=xxxx,password=yyy //Winxp/E-Disk /mnt/WinXp/E-disk

Soon I get mad. How do I continue?

Attach a copy of my smb.conf

I need help, please

best regards
P-G
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# /etc/samba/smb.conf
# samba configuration file
# last updated: 2/28/2002 by tms

[global]

;basic server settings
   workgroup = FAH-TECHNET
   netbios name = LinuxRH9
   server string = Samba PDC running %v
   socket options = TCP_NODELAY IPTOS_LOWDELAY SO_SNDBUF=8192 SO_RCVBUF=8192

;PDC and master browser settings
   os level = 64
   preferred master = yes
   local master = yes
   domain master = yes
   logon domains = yes

;security and logging settings
   security = user
   encrypt passwords = yes
   log file = /var/log/samba/log.%m
   log level = 2
   max log size = 50
   hosts allow = 127.0.0.1 192.168.0.0/255.255.255.0

;user profiles and home directory
   logon home = \\%L\%U\
   logon drive = H:
   logon path = \\%L\profiles\%U
   logon script = netlogon.bat

# ==== shares ====

[homes]
  comment = Home Directories
  browseable = no
  writeable = yes

[profiles]
  path = /home/samba/profiles
  writeable = yes
  browseable = no
  create mask = 0600
  directory mask = 0700

[netlogon]
  comment = Network Logon Service
  path = /home/netlogon
  read only = yes
  browseable = no
  write list = tom