can't log into my iTunes account

Every time I try to log into my iTunes account on AppleTV to watch the movies I've purchased in my library, I get this "Could not sign in" message on the screen stating that I would need to" type in a password followed by the verification code" that does show up on my iPhone screen. But when I go to retype my password, there's no additional screen telling my to enter the verification code and will continue to go back to the "Could not sign in" message.