so you have tried different RAM "sticks" in different slots?
your BIOS is 2002 which maybe upgradable:
from that log all i can see for mobo is P4X266-8233
or; VIA P4X266/8233, 1AGP/5PCI/1CNR SLOTS, 3XPC266DDR, AC97, ATX
here is
VIA
you need to find your exact model & see if there is a BIOS update.