What going on?? Aircraft problems!!!

I have installed a TWA\AA 757-200 and the flaps are black and the entire horinz. stab. is also black. I have been messing around with the settings and nothing will help. Also a MD-80 that is installed in the select aircraft dialog box the graphics are smeered(looks like its being magnified) these aircraft fly fine, but being a simmer perfection is a must. My system is running on XP and is using, 3Dfx 16mb graphics card, 256mb SDRAM, 1.2G Athlon processor. Is my system not powerfull enough to produce the graphics??? I also tried a program that checks the .mdl and they check out fine. The planes are GMAX; do I have another program installed?? Plz Help Chris