I have the Delstar DS

Question

I have the Delstar DS 4327 and everytime I load songs onto the MP3 player, it says "empty disk". When I look at it from My Computer it shows that there are songs on the MP3. Why is this?

When I unplug the MP3 from the USB port, it asks me if I want to create a playlist, and I say yes.....but still no songs!!!