WPF and D3DImage and D3D surface has annoying Flicker?

Greetings,

I am doing a project where I am copying a texture onto a D3D surface, and I
am using D3DImage to use it in a WPF panel.

Unfortunately I am getting a very noticable flicker when the image is being
drawn?
I am not sure how to make this go away?

I modeled it from the sample code found on MS web site:
CRendererManager,CRenderer, and CTriangleRenderer.

I modified the CTriangleRenderer to be a plane object, and I applied a
texture to it.
Now that the texture is being applied it...

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