You should be getting alot better performance than that. Make sure nothing is running int the background. Try re-installing the video driver. Ive had to do that a couple of times. Do you have the latest DirectX 9c installed?
well, it looks like i didnt have the latest of the catalyst driver, now its 40 fps... 30 at the least but i think its my processor... its been a couple years since i upgraded... ill get a new one next week.