Spent an hour searching for disabling sleep

[LuLuTheMonk]

Wasn't there a registry edit that you could do that would prevent your phone from going completely to sleep? I consistently have the problem where my phone will go to sleep, and pressing the power key very dimly lights the screen, but nothing happens and I can't get it to wake up with out a soft reset, and the phone does not receive any calls or messages.

Thanks.