Apple ID change with iOS6.1-Can't make purchases in iTunes

I recently updated my iPhone 5 to iOS6.1.  It insited on me chaning my Apple ID to an email address.  I did and now I can't make purchases in iTunes or in the App Store because my phone still shows my old Apple ID...

I've logged into MyAppleID.com and into iTunes and can only do so with the my email address.  I've tried rebooting my phone and syncing it...  still showing my OLD Apple ID.  Anyone know what to do to get the Apple ID on my phone to match the email address associated with iTunes???

Help.