Win2000 and PDC under samba 2.2.2

[DoudOUKE]

lo,
I have just install samba 2.2.2 and I would like to configure it as a PDC so I followed the Samba 2.2 PDC howto but I have a probleme when I want to join my domain with a client under win2k:
win2k ask me the login and a password of an administrator that could allow me to join the domain.
So I have create un samba account named root like it is said in the howto
but it doesn t work 

this is a cut from my samba log 
-------------------------------------------------------------------
[2001/11/20 12:25:30, 0] rpc_server/srv_samr_nt.c:_api_samr_create_user(1926)
  User p04ordi0$ does not exist in system password file (usually /etc/passwd). Cannot add account without a valid local system user.
  
[2001/11/20 12:25:32, 0] rpc_server/srv_netlog_nt.c:get_md4pw(150)
  get_md4pw: Workstation p04ordi0$: no account in domain
--------------------------------------------------------------------

this is my smb.conf
--------------------------------------------------------------------
[global]
        smb passwd file = /etc/smbpasswd
        domain master = yes
        security = user
        name resolve order = lmhosts bcast
        encrypt passwords = yes
        domain logons = yes
        time server = yes 
        workgroup = xxx
        server string = xxx
        netbios name = xxxxx 
        os level = 34
        Domain Admin group = @adm
[netlogon]
        comment = Service de connexion au domaine
        path = /usr/local/samba/logon
        public = no
        writable = no
        browsable = no
[profile]
        comment = Profils utilisateur
        path = /usr/local/samba/profile
        create mode = 0600
        directory mode = 0700
        writable = yes
        browsable = no
--------------------------------------------------------------------


thanks,
DoudOUKE