I just recently got the iPhone 4S and gave my iPhone 4 to my dad. We downloaded a new version of iTunes on his computer and he has music loaded from CDs that he has. When we tried to add music to the iPhone 4 by syncing it with iTunes the music doesn't load to the phone. When we look back at the playlist that we tried to sync, it has the small error logos next to each song. We tried syncing other playlists and got the same result. We synced apps successfully. What do we need to do to be able to successfully sync music from iTunes to the iPhone 4?