Re: Please enter the Registration code found either in your confirmation email...

you need to input the 20 digit code code in the boxes in the window that popped up...did you try that yet ?

also the code will be in the my games tab right click the game icon-view game details-click on that again a window should be pop open with the 20 digit code make a note of it

depending on what browser your using try clear the Internet cache and switch browsers  if using chrome,safari or opera try IE or firefox

edit typo