My MP3 Player has been working perfectly for over a year. The other night when I plugged the player in to charge, it displayed "USB connected" and it worked to charge, but my computer has not detected that the player is plugged in, and Samsung Media Studio does not allow me to transfer songs to it (or even click the "Portable" button). Also, Windows Media Player 10/11 is not detecting it. I tried uninstalling and reinstalling Samsung Media Studio several times and used different USB ports on my PC without success. Can you help me?