Please flash preloader help

1

I have a problem i have my movie and all works fine when i test it on flash the preloader works but when i upload it and open it on ie explorer it doesnt works only displays a blank screen then the movie starts without the preloader, but when i test it on firefox it works fine, is there any problem with my actionscript or is the browser please help me ive been 2 weeks searching and i havnt found any answer please heeeeelp!!!