think about it dude...your PSU doesn't turn on your computer simply by flipping a switch right..
http://www.casemodgod.com/cmg/Howto-story--16.html
Read that..you gotta connect the only green wire in there with the black wire to the left of it...use a paperclip...if you really want to see a good pic, I'll take a pic of my test PSU for you.
The power switch that you hook up to your mobo jumps those two pins which then sends a signal to the PSU to turn on...following that tutorial skips all that of course