Need help activating the game

I have downloaded the game for the trial. The first thing I did was enter my name. When I placed my curser over the ACTIVATE button absolutely nothing happened. When I placed the curser over the EXIT button, the box surrounding the curser expanded to surround the entire EXIT button and I was able to exit the game. When the curser is placed over the ACTIVATE button, there is no response at all. Am I missing something?