I have now tried twice and have found the same problem. When the machine starts up, it goes to post and locks up everytime at ACPI Irq 9. The processor I'm running is:
Intel Pentium 4 531 3.0GHz / 1MB Cache / 800 FSB / Hyper-Threading / OEM / Socket 775 / Processor
Shuttles site says that this processor is supported by the motherboard.
I've switched up ram and even left out the drives and it always does the same thing.