last night my ipod got buggy. whenever i plug it into my computer, it refuses to mount. it freezes my computer and itunes and wont show up until i unplug it. then it says that my ipod needs to be reformatted with the ipod updater. i've tried that but it freezes as well. i've tried booting into disk mode and it still doesnt work. i've even gone so far as trying to format it but even that wont work. soem of the songs on my ipod still work when i try to play them but some just freeze and skip to the next one. please help!!