I have an iPhone 4S with loads of music from CDs and such on my iTunes. I had an old iPod with the same account that it would all sync onto fine, however, when I try to sync it to my iPhone, nothing happens. The songs are definitely in my iTunes library. I have the settings for my iPhone to sync all songs when plugged in to the computer. Also, I have tried dragging the songs over to my iPhone where devices is shown in iTunes, and my iPhone doesn't highlight to accept songs.
Does anyone have a solution?