Right click doesn't work !

Hello everyone !
I'm here because while i play crossfire , i can't use my right click on my mouse ! and i try others mouse but still don't work !
So on i can't scope in-game and that's very embarassing you know
Of course i have changed the controls and set " special attack " to right click but still don't work .
By the way , every time i launch the game , i have to type again my controls because crossfire haven't save them
Again sorry for my bad english
Thank you