How to Enable DirectX Acceleration

I install Windows 7 64bit with Parallels Desktop 5.0 on macbook pro.
I had enabled 3D acceleration in Virtual Machine Configuration.
But, I run dxdiag and all DirectX acceleration are not available.

My parallels desktop build numer is 5.0.9370.
And I installed parallels tools.
The Direct X version in Windows 7 is DirectX 11.

how can I fix the problem?
 
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