07-15-2009 02:31 PM
Try the other mode (MSC):
1. Turn device ON.
Or, try plugging on a different USB port. I would recommend using the one at the back of your computer for a sufficient power supply (this is if you are using a desktop computer).
If MSC works, then drivers for MTP (default mode of the mp3 player) might be corrupted.
You can also try the troubleshooting steps found here.