[Samba] Win 7 NT4 Domain Login

[Robert Steinmetz AIA]

I have a Win 7 machine which accesses a Samba NT4 Domain. That machine 
has been used by a single user for a couple of years. I need to change 
the user. I find I can log in using the old users name and password, but 
if I try to login using the new users name and password I get an error 
message that there are no login servers. Sometimes I get an error 
message that there is not trust relationship between machine and the domain.

I am able to login to the domain with the new user from a windows XP 
machine.

I'm completely confused how one user will work and the other user will 
be rejected.