I cannot add "new" songs from my iTunes to my iPhone 4. I drag and drop them on the iPhone under Devices and nothing happens. I tried adding the new music to a Playlist and then added the playlist to my iPhone. The playlist is there but those new songs are not on my iPhone. When I look at the playlist from my iPhone in iTunes, it has these songs in grey with the sync icon to the right. Screen shot below: All songs are MP3 and nothing special about them. Anyone else have this problem or have an idea of how to fix? Thanks!!