[Samba] Hi & HELP

[ch725]

Hi, all every body
 My name is Jesus Reyes and I a new in the list.
 I need configure a Samba Server for my job.
My system is:
    -PC INTEL P4 at 1.6 GHz
    -SuSE LINUX 8.0
    -Samba 2.2.8
In my net have PC Win98, Win2k and XP
I have already  NT4 PDC (OLD_DOMAIN)

I try to configure samba for PDC but don`t work. My NT Server don`t see
MYDOMAIN and I try  to join in Win2k at new domain and ask me "The domain
are inaccesible or not exist".
I add the my machine in /etc/passwd and /etc/samba/smbpasswd
BUT I get the path \\main\  (MAIN is the netbios of my server) and logon
promt apear and logon with my password (create by smbpasswd -a user) and
came into the my home directory and share subdirectories.

BUT I can`t authenticate in SAMBA

Please I  need a urgent help,Below are the smb.conf  if I have a mistake
please helpme.

T.I.A

        Jesus


# Samba config file created using SWAT
# from main.jvr.cu
# Date: 2004/05/04 18:30:17

# Global parameters
[global]
 workgroup = MYDOMAIN
 server string = Samba Server
 encrypt passwords = Yes
 log file = /var/log/samba/log.%m
 max log size = 50
 logon script = %U.bat
 logon path = \\%L\profiles\%U
 logon drive = U:
 logon home = \\%L\%U
 domain logons = Yes
 os level = 2
 preferred master = Yes
 domain master = Yes
 dns proxy = No

[homes]
 comment = Home Directories
 valid users = %S
 read only = No
 browseable = No

[netlogon]
 comment = Network Logon Service
 path = /usr/local/samba/lib/netlogon
 guest ok = Yes
 share modes = No

[profiles]
 path = /usr/local/samba/profiles
 guest ok = Yes
 browseable = No

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

[tmp]
 comment = Temporary file space
 path = /tmp
 read only = No
 guest ok = Yes

[Instalaciones]
 comment = Public Stuff
 path = /home/samba
 write list =
 read only = No
 guest ok = Yes