How to WHQL certify a mirror display driver in Win XP?

I developed a mirror display driver for our usb to graphics adapter in windows xp and I need to get MSFT WHQL certification. I setup DTM server & client and I can schedule display adapter tests in the target machine which runs my mirror display driver.

But as soons as the test setup runs in the target machine, test script disables the mirror display driver and runs the test on the native display adapter.

Has anybody got WHQL certification for a mirror display driver in windows XP?

Please advise.