I am at a university and need some guidance. I just bought an airport express, and I though I configured it correctly, but something's rotten in Denmark. Internet and music streaming work...great, however there's one problem: I'm unable to use rendezvous/sharing in iChat or through iTunes. So I can't share music or talk to people like i could normally through my wire connection. I thought maybe i screwed something up, so i just tried using my campus wifi connection ( sadly the reception ends about 100 feet from my on campus apartment). Immediately I can share music and chat via rendezvous. My main concern is rendezvous chatting, but sharing music would be nice too. I've tried reconfiguring the damned thing several times using Airport Setup Asst and Airport Admin utility. help would be appreciated!