Hm, what operating system are you running? I am also on a network, I use vista, and didn't have an issue.
You could also try contacting Gamepath's support, as they'd be able to help you much better than I.
As far as other services, there are lots. Basically, just search for proxy connections. I just think Gamepath is one of the most widely used and safest to use due to its WoW fame. Most others will put a lot of spyware on your computer.