I have a Samsung Jack running Windows mobile 6.5 with a 2GB microSD card. In my previous Vista installation I would sync my music library to my phone with media player. When I reformatted and loaded seven I recopied my old music files to my new folders. Since then I have bought 2 new songs off Amazon MP3 and integrated them into my library. When I sync my library to my phone these two songs will not play. Media Player Mobile hangs and then gives me numerous error messages. All my old music plays fine, including songs that I previous purchased from amazon.