Q: Email cannot be used to unlock iphone

3/23/16

I just updated my phone to the current iOS update and after it finished i tried to unlllock it and it says "xxxxxxxx.com cannot be used to unlock this iPhone." I know my Apple ID and i can access it on the iCloud and the Apple ID website but i cannot unlock my phone. Other email addresses do not work and when trying a different password it just says "incorrect id or password" and when using the right password prompts the earlier error. What do i do? I've tried shutting off Find my iPhone as one website suggested but i cannot access it from my phone or iCloud.