I have the Sony GTV Blu-Ray Player. At first it showed up on my Windows networks as a playable media device. I could right click videos, go to Play To, and select the Sony Internet TV, and it would start playing on the GTV. But then it suddenly disappeared. It still shows up on the network as Sony Internet TV, but not under the Media Devices category. I can still navigate my computers' shared media libraries from the media player, but I have lost the ability to "Play To". Any thoughts?