Prevent flash game from being hack

Hi all,

Recently i’m helping a client running some online promotion with a flash game as part of the activity. However, there is some hacking problem going on. The highest possible score is 1500 can i have score above 1500 coming in.

Asking a few friend and found out there is some program like tSearch that can change the hex value of the swf and thus “hack” the game.

I’m wondering did anyone of the forumer ecounter this before. How do you guy usually prevent your flash game from hacker like this…

Please advise…