Well you have to understand that AFP is not the like the other sims out there. It needs a better video card because of the complexity of the physics to match real life. 32 MB is a better card and it must have 3D capability.
There have been many posts in regards to your request to get a better frame rate. See
www.aeroflypro.com/download look in the installation & config forum.
Is your vid card Open GL? Have you installed the patch? Have you tried going to 8 bit color?