Ok I have a problem. The past couple of weeks I have had my macbook I have been able to get online no problem, whether it be from home or Cal State San Bernadino. However today I get to class and try connecting to the internet, and it just isn't working. When I open my network config and all that, it says my airport card doesn't have an ISP address. I tried restarting and shutting down and nothing is happening. Any help would be appreciated.