I was driving one day with my 30GB iPod video hooked up to the cassette tape car adapter when I heard a screeching sound and the stereo went silent. The adapter still functions with other iPods (it attaches into the audio jack), the headphones I currently use work on other iPods, and when I connect my iPod to a car adapter or speaker system through the (forgive me for blanking) thing on the bottom of the iPod, it wont play music. It will still charge, and the iPod displays that its playing music, but no sound. So what would cause the audio jack and the bottom port to stop fuctioning? And how can I fix it? Much appreciated.