ERROR Cant make me start and boost CrossFire.

Dear CrossFire,
I have problems with connecting on CrossFire.
Evrey time when I wanna boost up I get this message:
Cannot open Shader file-rez/shader/legacyshader.fxo, file not found.
Can some help me to solve this problem, I would appreciate it.
As fast as possible please and I'm sorry for my bad English.
Faithfull regards,
WhiteLotuZ.