Hmm, this may be because your board has failed the power on self-test. This is usually means your board is cooked. Otherwise, consolt the motherboard manual and find the jumper that clears the CMOS and give that a shot. Note this will reset the BIOS/CMOS and you must reset the time.
Hope this helps.
Thx for all your good advice, but I found out that I had forgotten to install the cpu which i have somehow lost.
I'm tired of putting together custom systems and am now going to buy a mac.