RAM problem

hi, im having a problem with the ram usage of my movie

my movie consist in a mc with an animation made in 3d, so i have like 40 images.

once the animation is played, i dont need it anymore, so i tried using removeMovieClip and unloadMovie, and delete, but nothing works, any clues?

i need to clean up my memory, im using more than 270 MB

please help me

regards