Replacing an antec sl400 power supply with a coolermaster real power 450. system is a abit kx7-333 with a 2400+, a stick of 512, 120gb hd. Plug the new power supply in, all the connections are proper, hit the power button. The psu flashes on for a second then shuts off again. Tested the new power supply on an abit ic7-g board and it works fine. any idea on what would cause the compatibility issue? Thanks