Proxy Settings and unable to connect

I have a dsl link which serves a 4 machine network running under win2k server.
There is no proxy server.
I keep getting messages up saying xolox network connection error. do you want to re-configure network settings
As the system doesn't sit behind any proxy server i select 'no proxy' again, same thing happens after a few seconds. I've tried 'return to windows settings' - same thing, and 'ignore' same thing.
Can you help me please - what am i doing wrong?

Great program by the way - I love it.

Jude.