Evil Campus Router

I'm getting strange error messages and problems when loading certain things from the internet.

Concerning maple:

 Spoiler

I'm currently behind a wireless router from the campus here in Cachan, France.
I'm also using a proxy (as instructed by the people here, in order to access the internet).

The computer used to run fine in Brazil and my account is old enough that I don't get IP blocked.

Any idea how I can get maple to work?

EDIT: I meant CAMPUS, not COMPUS.