I just bought my brother iphone 3g off of him, and i am having problems synicing music from my computer to my phone. My computer recognizes my phone, and it can back up my contacts, but when i try to sync my play list to my phone it goes through the process of syncing then finishes.... when i check my phone there is no music? I even uninstalled itunes and reinstalled it, then restored my iphone to the newest firmware and it still doesnt sync my music ? any idea whats going on ? pleeeaasee 