PlS NO HACK WORKS FOR ME

Hello guys ive been trying to hack CA but everytime i try to inject it it says file data d3xd9.43 or something like that then the games load but no hack , nothing it didnt work i don't know what to do ive been trying different injectors different tutorials but none of them works for me pls take a few minutes to help me im noob and i just want to have fun killing people. Thanks for help

Or if that doesnt solve it update your .NET Framework.