I have a new mac mini. I am having some airport issues (another topic) so it is connected to my Airport network through an ethernet cable connected to an Airport Express. Everything runs fine. I have internet connection, i can see the hard drives attached to my Airport Extreme, i can print to a usb printer on another Airport Express. But when I open up iTunes, under devices, neither of my aTVs show up. I've tried restarting the aTVs and the Mac mini, but nothing. they just don't show up So I can't sync or stream content. However, I can send audio to both aTVs via Air tunes. This works seamlessly. Any thoughts?