I have mezzmo on my Windows7 PC. It runs without errors, and I can usually play media on the Samsung TV, but on the Samsung Galaxy Tablet 10.1 and my Samsung Galaxy S phone, it will play some media, but not others. Some media that plays on the TV won't play on the tablet and phone. Some music and videos that play on the tablet do not play on the phone. There is no reason given, just "Unable to play".