This has been driving me crazy for a long time. My old MBP would never be able to start a video conference, no matter where I was. I would always get a communication error when I attempted to do so, and I figured there was something wrong with my computer. I just got a brand new MBP (awesome!), and attempted to start a video iChat... and I got the exact same problem. I copied all my data over from my previous MBP, so I am 100 percent convinced it is a software issue. I have tried deleting my preferences, switching internet connections, and nothing works. I need help! Does anyone know what I should do?