Case power button not turning on system

Just ordered new parts:

P67 Intel motherboard
550 GTX EVGA gfx card
3,3 ghz sandy bridge quad proc
2 sticks of 4gb ram ddr3

I just used this case yesterday, so i know the cables are fine. Everything is connected, and when i flip the switch on my power supply a green LED does light up on my motherboard.

If you're directly facing the connectors, you put the Power SW at the bottom left, one over because you dont fill the left side. Above it comes the Reset SW, with the HD to the right of it, and the P-/P+ below it (or to the right of the Power SW).

I dont know if somethings up or im missing something obvious.