I'm having a mapping problem. I have a Windows 2003 server in the workgroup group. My Windows 7 PC is in a domain. I'd like to share files between the domain and workgroup. Most of the time i can't see the Windows 2003 server. When I am able to, it asks for a username and password. I put it in but it says it's invalid. How can I get a PC in a domain to talk to the Server in the workgroup group?