Sleep works in 32bit but not 64bit...
 

I've got Snow Leopard working in 32bit including sleep without SleepEnabler and without NullCPUPM. However, when I boot into 64bit, it hangs on the black screen. With SleepEnabler and NullCPUPM (tried both E/E and S/L/E), I can hear a pop with the audio which is what I usually hear before the system sleeping, but it still hangs. Any reason this would be happening that I'm looking over?