My music is gone

I was using the clip when all of the sudden it went dead.  I figured I had run out the battery so I went home and tried to charge it, but my computer would not even recognize the device.  I tried plugging it into the wall with my razor charger and got nothing.  A bit later I decided to try and charge it through the computer again, and this time it did recognize the device and it appeared to charge.  I thought all was well, but when I went to use it, all of my music was gone.  Yet, when I went to reload the clip using WMP, it still shows that all of my music is there!  Can anyone hep me?  I’m debating just buying a new device.

Thanks in advance for any advice