Windows 7: Directx 9.0c crashes games

I have ati radeon hd 5670 and its made for directx 11, and i have it, but i also want to play some games witch dosen't work on directx 11, so I installed directx 9.0c, for the games, and for a while it worked, but now my directx 9 dosen't work anymore for example I wanted to play spellforce 2 faith in destiny, and crashes because directx, and its not the only game and even "fraps"(programs that shows the fps on a game) say that i need to reinstall my directx 9.0c and I did reinstall the last version but nothing. anyone haves any idea of what I can do other that reinstall my windows?

Firstly, Welcome 7F evo.
You can run bost DX 9.0c alongside DX 11 by going to here: Download: DirectX Redist (June 2010) - Microsoft Download Center - Download Details
Install, Reboot and hopefully the games will be working better.

Sincerely,
Sparrow.

I know that BlackSparrow and I did installed the same directx that you give the link and it didn't work!!! That why i posted here!!!