Debugging a WPF Application Using PIX / Visual Studio 11

Question

I am just working on a WPF application that uses DirectX 11 to display content. Now the problem is that I cannot debug DirectX.

If I use PIX, I always get the error message: 0x00000007b, that the application could not be started (after clicking "Run experiment").

If I use Visual Studio 11 and click “Capture Frame”, it starts the progressbar endlessly and after clicking “Stop Debugging” it still shows a progress bar and now the message “This application is using an incompatible version of DirectX or unsupported functions. Playback may be incomplete "

Why is this so? Why is my application not supported? Is it because of WPF?

thanks