Unload issue with flash component

I’m using a flash component (Media Playback) to play some videos on my site. How it works is when a user clicks a particular button, it creates an empty movieclip which loads an external swf with the Video (flash component and all).
The problem is whenever i try to unload it to play another movie clip by clicking another button with the following code


on (release) {
	mov5.unloadMovie("bb2.swf");
	createEmptyMovieClip("mov6", 1);
	mov6.loadMovie("bb.swf");
	mov6._x="131";
	mov6._y="-13";
}

I run into problems. The other movie loads but the original one being played doesnt unload. Anybody have any idea what I’m doing wrong?