My dad has pioneer head unit (Navi) in his truck and for some reason when I plug it into the usb it will not read any of the music. I've made sure that the music is in the media folder, I've put it into USB Debugging and I've also tried mass storage but it won't work. There are 2 S2's in the house and neither of them will work on that head unit. Is there anything I can do to make this work? Is there something I'm missing? He used to have a Hero (I know really old) and as soon as he plugged it in it would read the music and play; same thing when I had an evo. What's the difference with this phone that it doesn't want to work? Thanks!