Computer won't wake from sleep

[ProCoComputerRepairs]

Okay, first thank you for reading this

 

Here's the problem, I have a computer I built awhile back, and I re-installed windows 7 on it.  I had no problems with this computer before waking from sleep mode, but now since I re-installed windows on it it won't wake from sleep. The power button blinks and blinks. When I go to press the mouse/keyboard, it doesn't wake from it's coma, even if i press the power button it will NOT wake. So in order for me to get it to turn back on, I have to turn the PSU power switch off, and hold the power button on the computer to drain the power, then switch the PSU power switch back on and power it on to get it to come out of sleep mode o.0. 

 

Here's what I tried to do so far:

1)Get the latest updated drivers from the motherboard website-(seemed to work, but when I left it in sleep mode for almost an hour, it started again.)

2)checked device manager to see if the mouse and keyboard is allowed to wake computer( it is.)

3)Check bios setting( still the same as before, with my last installation of windows)

I've check the power options, but changing some stuff didn't work, If i can't get it to work I'm just gonna disable it in the Registry. Anybody knows how to fix this issue?