I've got a new AirPort Extreme and I'm trying to hook it up as a music streamer to my stereo. I finally got it set up, that took forever. But the light has gone green. However, now its at my stereo and I don't have any sound coming from it. Help! The setup is MacPro desktop, lacking an airport so connected to my router via ethernet. The router is a Linksys, which is connected to the modem. My wife and housemate each have airports on their computers. I can only see anything in AirPort Setup Utility when the ethernet cable is plugged into the AirPort and disconnected from the Linksys - and under those conditions, under music, it says that I should look in the lower right of iTunes to switch between the stereo (2 rooms away) or the Mac itself. But there's NOTHING in iTunes. So: help!