Ok, I had the Mac user bring his laptop in so I could see what it is doing. Here is the scenario:
We have a Windows domain. I have this one computer (a radiology computer that allows the users to view CT images) hooked into our switch but not a member of the domain. I installed a 2nd network card in this machine so we can see it from our domain. We just use \\I.P. address to access this computer. It works great.
When the Mac connects via VPN to the domain, he can ping the radiology computer and I can even connect to the other servers and clients that are members of the domain but when he signs in to the radiology computer with the administrator username and password it gives him the following error: "The finder cannot complete the operation because some data in "cifs://I.P. address" could not be read or written. (Error code -36).
He has no trouble accessing the other computers that are on the domain, only this one. He can ping it, he just can't sign on. I know the username and password are good because its the Administrator username and password.
Does this help diagnosing the problem?
Thanks again for the help.
Shannan