Need some help on this one. Every time I attempt to sync my iPhone, it starts with, in the bar at the top, with Backing Up *Name*'s iPhone, then Syncing Contacts, Syncing Applications, then switches to a generic "Syncing *Name*'s iPhone" message- then it simply stops as if it had been cancelled. I've tried this several times, to no avail. Any changes I make to Applications or Contacts ARE changed, but it never changes Music, Ringtones, Videos, etc etc. Any assistance?