Why I can not play Crossfire in Windows 7?

Hello friends!!
Well my problem is:
I'm a Mexican and a few days ago Windows 7 install on my pc, previously had Windows XP but when installing Windows 7 and I could not get to play Cross Fire.
I could install it but when loading the game comes out the following legend:
Client File Corruption Detected, Closing Game Client
My operating system Windows 7 is an activator is why I can not play, I hope you can help me thanks.

I leave my mail for anything
shaorangdl@hotmail.com

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