I could see the host computer, and the available database, but when I tried to login, I would get a username/password error message. This happened in peer-to-peer networking, and IWP.
After spending about an hour on the phone with tech support, it looks like a corrupt B&W .EPS file in a container field was the problem. Still can't delete that row, or show that field (I created a new container field), but it works. In the future, I'm not embedding the graphic files in the solution.