1. your outlet might be broken or out of power. my ds charger doesn't work because the outlets in my house are weird and don't have any more power the next time i try to charge it. 2. your computer have to be ON if you want to charge it. some people put it charging the computer, but not on the computer so it will not charge. hope this helps!
Look at the place were it charges their should be 2 little pronges that should be equidistant (equal distance) apart if they aren't their then u would have to get a new ipod (if under warranty it should be free)