You may only need a new cable. I have had sansa fuze cables go bad, and the comptuer will not recognize it, althought it may or may not charge with the cable at that point.
I would suggest to buy a sansa fuze off of Ebay, (make sure it comes with charging cable), and if you get lucky, you can charge or maybe at least rescue your songs from your old fuze, and at the same time have a working fuze either way.
