Ultra 2138 Not turning on!

I tried to turn the Pc on and it didnt cut on. I made sure everything was connected on the inside before i had cut it on so i took another psu(Corsair GS600) out my other computer and put it in my Ultra. The psu tried to cut on with the fan spining but a sec later it cut off. So then i took that psu out of the Ultra and put it back into my old computer and it turned on with no problem at all. I did that paper clip trick with the XtremeGear psu that came with the ultra but it didnt seem to work and i know its not my Corsair so is there anything else i should check? I didn't try to put the XtremeGear psu in my other computer to see if it works because XtremeGear sucks!!