Error when submitting score

It happened for two games that I played today: Space Invaders and 30k Starfighter.

In both games I got highest score, but when I tried to submit the score, it gave me this error: This score was not submitted from the game. Your score will not be saved."

Does anyone know why? Man this sucks. For 30k Starfighter I got to 32 million points before I just quit because it took so much time and I am so tired.

Just incase because of the timeout issue, I set my forum's session timeout to 36 thousand seconds (36,000) and the cookie is enabled.