Patch issues

Hello.
I always have one problem with patch : always when i start crossfire with starts downloading thats fine until there. But when iam starting the game it says : "Client file corruption detected, closing game client".

I already reinstalled sevarel times and downloaded from diferents sites its always the same error

http://img697.imageshack.us/img697/1407/sdqwe.png

Can somebody help me ?


PS: i have got windows xp Sp3