Sorry, I got the same problem, go and check the name of your graphic card and see if it actually supports DirectX11, You can have it software wise.
If you search dxdiag in your search and run it, it should show you what version of DirectX you have.
But like i said, The graphic card must be able to support it Hardware wise, just go look it up.
My GeForce GTX285 can't support it so i'm stuck with a game that don't run.