can't join NT domain

[Carlos Capellan]

Help! I think I've done my homework here, but it's
still not working. I got the network folks here to
make me a machine account in Server Manager so I can
join the domain (which I don't control). They told me
everything should be ready, and when I type in the
command (after stopping samba):
smbpasswd -j <domain> -r <PDC>
I get the standard NT_STATUS_NO_TRUST_SAM_ACCOUNT
error, which I've seen several posts here about.