after I set up my iPhone with iTunes I can no longer get all of my previously purchased songs. It says the computer isn't authorized. Then I authorize it and still can't access purchased songs. Whatever I purchased after iPhone will work. I've called iTunes and iPhone and they can't fix it after hours on the phone and uninstalling and reinstalling iTunes and QuickTime and restoring iPhone. Does anyone know a solution to this? I have 200 songs I can't access. I have also deauthorized and reauthorized in the iTunes store. Please help!