I created and purchased a ringtone from iTunes, downloaded it to my pc then uploaded it to my iPhone...all's good so far. My pc gave up on life so I had to replace the motherboard and in the process screwed up a lot of software, including iTunes. Now, when I want to sync my iPhone to my iTune, I'm told my ringtone can't be saved on iTunes because my pc is needs to be authorized. But when I try to authorize it I'm told the pc is already authorized... Help! How do I get out of this loop without loosing the ringtone (that I paid for!)?