Exporting from AE into Flash (FILES SIZES ARE HUGE!, HELP)

OK, i made a AE header for a website i am doing and when i made it into a SWF it was huge! LIke 8MB for like 20 seconds of nothing fancy. I realized that when i uncheck the rasterize unsported features (i think thats what its called) in the dialog box for exporting SWF the file size gets smaller but all my effects are lost. Does anyone know how i can keep my graphics and lower my load time. I mean its pretty ridiculous, i spent the past 2 days doing this project in AE and i might have to scrap it for load time! HELP