D3DKMTEscape works in Vista 5384 fails in Vista 5442

Hi all,
I would like to validate Timeout-Detection-&-Recovery (TDR) feature of
Vista. For which I need to force TDR.
I am using D3DKMTEscape with
escape Type D3DKMT_ESCAPE_TDRDBGCTRL
pPrivateDriveData pointing to an enum containing
D3DKMT_TDRDBGCTRLTYPE_FORCETDR.

It is working perfectly with Vista 5384 Bet2 build.
The problem I’m facing here is It is not working with Vista 5442 build.

please help me find out the solution to this problem.

Thanks,
Madhu