apple tv dont let me log in my apple id
i bought my apple tv and conected to the tv and wifi, i can use the airplay on my mac and iphone but when i try to log in my apple id, it says " the apple id you entered couldn't be found or your password was incorrect, please try again" but i try 5 times and my password was correct and still saing that, i change my apple passwords and still saing the same. and when i hit the menu button only appears the computer and general options. Please help!
AppleTV 2, OS X Mountain Lion (10.8.4)