How to REMOVE the previous page and upload the new page

1

When I click on a horizontal navigation button, it uploads the new page on top of another instead of REMOVE the previous page and upload the new page. How do I fix it? Both this.myLoader.removeMovieClip(); and this.removeMovieClip(); don’t work.

var myLoader:MovieClipLoader = new MovieClipLoader();

function clearPage(){
this.myLoader.removeMovieClip();
}

homeMC.onRelease = function() {
clearPage();
myLoader.loadClip(“home.swf”, mcHolder);
}

designMC.onRelease = function() {
clearPage();
myLoader.loadClip("design.swf ", mcHolder);
}

developMC.onRelease = function() {
clearPage();
myLoader.loadClip(“develop.swf”, mcHolder);
}