removeMovieClip not working. Please help

1

Can anyone tell me why this movieClip is not being removed from the code below? Thanks!


function showPup(blip, whichOne, newName):Void{
 blip.attachMovie(whichOne, newName, this.getNextHighestDepth());
}
this.waBlip_mc.onRollOver = function():Void{
 showPup(this, "waPopup", "waPopup_mc");
};
this.waBlip_mc.onRollOut = function():Void{
 this.removeMovieClip();
};