Have a 2GB Sansa Clip that is not showing all of the music that I have on the MP3 player. When I plug it up to a Windows 2000 machine, I see every song that I have placed on it every since I bought it. When I plug it up to a Windows XP machine, I only see the factory default music and folders that came with it. Also on the Windows XP machine, I see only recent songs that I placed on the mp3 player. Did do the firmware upgrade and still having the same problem. Tried sync with Windows Media Player and nothing seems to work.