[Samba] Problem whit XP PRO client

[Dr Jekyll]

Hi. I'm entering in Samba's world and I need help with this. An Nt4.0
client was upgraded to XP PRO, and Win does not connect to domain
(before upgrade worded fine), windows registry was modificated as samba
howto explains.
This is my smb.conf file of samba v. 2.0.7. 
Thanks, thanks, thanks.
Dr Jekyll

[global]
############## 
        workgroup = X
  security = user
  status = yes
        encrypt passwords = yes
        smb passwd file = /etc/smbpasswd
        local master = yes
        os level = 33
        domain admin group = @adm
# NT
#       os level = 64
  domain master = yes
  preferred master = yes
  domain logons = yes
  logon script = %u.bat
        wins support = yes
        log level = 3
        log file = /var/log/samba/%m.log
                                                                             
#  add user script = /usr/sbin/useradd -d /dev/null -s /bin/false -g
equipos -M %u -c X
#       invalid users = root
#       valid users = root
  admin users = root
# password = server
        netbios name = pc_linux
#       server string = Servidor de archivos ver. %v en (%L)
                                                                             
#       os level = 32
        socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=8192
SO_SNDBUF=8192
        interfaces = 192.168.1.60/255.255.255.0
        create mask = 0777
        directory mask = 0777
        force create mode = 0777
        passwd program = /usr/bin/passwd %u
        unix password sync = yes



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