Ipod Shuffle wont work

Ok so my mother bought an ipod shuffle (4th gen) and we plugged it into my computer and connected it to itunes and it worked fine for about three days, then the battery ran down and I tried charging it again but it wasn't recognised by my computer at all, I plug it in and nothing happens. At first if you held the play button it would make three beeps then stop but now its doing nothing. My ipod touch and my brothers both connect to the computer fine. I've just had her shuffle plugged into my computer constantly and nothings changing, any ideas what's wrong?