I am having an issue with my Apple TV2 that I'm wondering someone can help me with. First few days using my Apple TV2 everything was fine, but now every time I want to access the media on my iMac, I have to go into the settings and turn off and then back on Home Sharing. It does not automatically "connect" when I turn the Apple TV on. Can anyone shed some light on this? I have the latest version of iTunes, as well as the latest version of iOS on the Apple TV, and both are connect via my local WiFi network.