I am installing my new p4 setup and i plug everything in and I go to boot up and it won't start. Then I look at the mobo and there is this 4 plug thing and I look at the directions and i shows them pluging in a 4 pin plug along with the regular ps plug and I can't find one on my ps (a 400 watt sparkle) all I have is a another rectangular one marked p2. What do I need and where can I get it, preferably tonight or tommorrow.