I am confused ? Either you're only telling half the story or I've misunderstood the question you are asking ?!?
You said....
Now when I attempt to login I get a message, Server Internal error
Which I interpret to mean the following sequence :
- You browse to the server
- You enter the username/password
- The server displays a message saying "server internal error"
Hence, as far as I'm concerned I can't see how that can be an issue anywhere else other than something on the server for your IT department to deal with.
As for your question about circumventing proxies ? I thought you were dealing with access to a work system. Why are you trying to hide behind proxies ?
Maybe you can take some screenshots to show what is happening ?