Montecristoff's Tweaks!

HI. I need to keep the screen on of my HD2 when i am in a call, I download this tweak for disable the lightsensor, so the screen keeps on, but isnt working, does any one knows why??    If I turn of the phone the option of disable the lightsensor, becomes activated again.                      Please help me or if someone knows how to keep the screen on let me know                                Thanks