My computer (window vista) don't recognize my ipod anymore

, I tought the problem was the wire and try with my friend ipod, but it work perfectly. Also I tried to just boot with redsn0w, and it worked too, only problem it don't charge and it don't recognize so I can't use DiskAid. For the problem of charge when I use a charger it work so it's not a real pain, but I really want to use DiskAid so anyone has some sugestion ?