For all Mp3 Players, iPod's and PSP's. If you can't get music to play via headsets, but can via computer try this, always works:

1. Remove files
2. Unplug Device
3. In "Settings" find "Format"
4. Replug into USB
5. Add songs
6. Unplug

If you have problem putting songs on, check available room, if full remove songs, if free contact manufacturer.