Problem to join my Nt domain

[priest]

> When i try the command :
>
> smbpawwd -j DOM -r PDC
>
> I get this message:
>
> cli_net_auth2: Error
> NT_STATUS_NO_TRUST_SAM_ACCOUNT
> cli_nt_setyp_creds: auth2 challenge failed
> modify_trust_password: unable to setup the PDC
> credentials to machine X. Error was:
> NT_STATUS_NO_TRUST_SAM_ACCOUNT
> 1999/09/03 08:57:18:
> change_trust_account_password: Failed to cjange
> password for domain Y
> Unable to join domain Y
>
> I When i change the name of the PDC by it's IP address i
> get:
>
> modify_trust_password: machine xx.xx.xx.xx
> rejected the session setup. Error was: code 131 N
> 1999/09/03 08:57:18:
> change_trust_account_password: Failed to cjange
> password for domain Y
> Unable to join domain Y