Wireless Network not working in some locations

Im running windows 7 home premium. I have a Dell Latitude D360. My laptop will connect at home or at family's wifi however it will not connect at school. There are two available wifi connections and it will not connect to either. I have followed my university's instructions to connect to the internet but no good. When I run troubleshooter the error says "unable to configure ip address" or something along those lines. I have reinstalled the network adapter, changed firewall setting. I have tried just about anything I can think of. please help!