TROUBLE WITH MY SANSA CLIP!

I recently, just started having a problem with my Sansa Clip. When I plug it into my computer it says it’s charging which it is, but it’s not really connected to my computer. I downloaded the latest WMP11 and everything else, so that’s not the problem and it’s on the correct USB setting, so it’s not that either. I’m really frustrated, and hopefully you can help me out. Thanks so much! 

Could you please explain:

When I plug it into my computer it says it’s charging which it is, but it’s not really connected to my computer. 

 Is your USB cable firmly inserted?  You also may want to try another USB port/cable.