Computer Login Issue on SBS 2003

Greetings,

I am having a problem with one computer on our network that runs sbs 2003. The other nine are working correctly and my client login works at all the other locations. When I log onto my computer it appears to be logging onto the network. The proper domain is shown under the user name and password but once I am in and attempt to access anything on the server (shared folders, my documents, email) it gives me the message not available, try again later. The internet works so I dont believe its a connectivity issue. I have tried deleting the computer and taking it out of the domain, renaming it. Nothing seems to work. Help!!! Thanks!