Turn off AA/AF, install the drivers using driver cleaner and then reinstall the 4.11 or 4.12 beta drivers from ATI's website.
Your score is way low; if you've got a recent system with 512MB of RAM or up you should be breaking 10K in 3dmark03. I suspect AA/AF is on for the benchmark, but it could be other symptoms (see below):
Make sure your chipset drivers for your motherboard are installed and up to date; make sure AGP aperture is set to 128MB or 256MB in the BIOS; make sure 4X or 8X AGP is on in the BIOS (turn on the highest your board supports).
Also list your system specs so we can better figure out what is wrong with your PC.
Btw Todd, we have very similar systems! I've got a P4 2.8 @ 3.3 Ghz on an IC7 with an X800 Pro at 525/525. 1GB DDR as well...
