i've had my 2G for a few months, and at first it worked when i hooked it up to a griffin FM transmitter, and sort of worked (with charging issues) with two different docks that i had for my previous ipod. now all of a sudden, when i plug anything into the dock port, it will only play through the ipod speakers, not through the dock or car speakers like it's supposed to. do i need a software update? or is there a setting that i messed up? ANY help is much appreciated!