Power, no power?

[AntiSocialMunky]

I finally got my CPU and mobo today - a E6300 and a Asus P5B-VM. I finally finished connecting everything together after cutting myself a few times on the brushed aluminium but it won't turn on. The 'receiving power' LED on the board lights up and I've checked the connections several times but I just can't get it to turn on.

Any advice?

Its an Ultra 400W PSU but that's probably not the problem, I probably overlooked some wiring.