unLoadMovieNum troubles

Hi

I´ve loaded a movie into level 2 and want to be able to get rid of it again. I´ve tried using this:

on (release) {
unloadMovieNum (“flash/many/video.swf”, 2);
loadMovieNum(“flash/many/design.swf”, 1);
}
But get an error, being a total action script retart I cant solve this problem:(

Is it better to unload the movie on a frame script or what?