I'm not sure what you mean when you say "i can log on to any other computer with those accounts fine."
You mean it's only one workstation you can't use to log on to the server?
Or you mean that's the only server you can't log in to from any workstation, and you can log onto other servers fine using the same account details?
Certainly sounds like some permissions problem, but I can't tell where it's originating unless you give me some further details.
Master of common sense. If you don't like it, stop reading.