Did a backup on iTunes yesterday and for some reason iTunes kept saying iTunes not authorized on this computer for 4s. I would enter password and iTunes would say computer already activated and after clicking ok would pop back up saying computer to activated. Now I can't access iTunes or app store from the phone. I get a partial iTunes web page when I access the app store from the phone. I try to enter my account information on phone and get message "cannot connect to app store". I have rebooted the phone multiple times but nothing has changed. Any suggestions?