Your motherboard is only 100Mhz fsb. So the best it will take is a duron 1300 or a athlon 1400 thunderbird. Both run at 100Mhz fsb. Unfortunately they are hard to find.
You could put a duron 1800 in and it will run at 1.35Ghz. This is because it has a multiplier of 13.5, just in your specs.£31.99