My 2gb IITronics MP3 player won't start!?

2 Hours ago I loaded 6 new mp3s to my player, it started fine and I went out for a walk, it played 3 songs (all of which had been on the player already) then in the middle of the forth it just went dead. Now it will not load past the IITronics logo and my laptop can't find it as a removable device? The battery was not low and even with a new one I still get the same result. Does anyone know of a way to reset the software on these things?