samba - Nov 2001 - unable to setup the PDC credentials to machine

i typed in the following command from bash:

smbpasswd -j DWARFS -r DOPEY -U Administrator%password

and got the following output:

cli_net_auth2: Error NT_STATUS_ACCESS_DENIED
cli_nt_setup_creds: auth2 challenge failed
modify_trust_password: unable to setup the PDC credentials to machine 
DOPEY. Error was : NT_STATUS_ACCESS_DENIED.
2001/11/14 22:01:22 : change_trust_account_password: Failed to change 
password for domain DWARFS.
Unable to join domain DWARFS.

can someone please help me figure out how to troubleshoot this?

tia

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