ActionScript 3.0 :: Remove MovieClip In BeatDetector Class?

What I'm trying to do is this: use the AS3 computeSpectrum method to trigger movieclips, one for each frequency band of the spectrum. Ideally, I'd like the movieclips to be placed on the stage using onEnterFrame or something, and then tweened (scaleX & scaleY) when its frequency band is triggered. does what I want, but this class uses the fillRect method to draw white squares when the frequency bands are triggered. I'm trying to replace the fillRect method with movieclips...So far, I've managed to add a movieclip to the stage from within that BeatDetector class (SoundBeat.as), but cannot get it to go away, it just keeps adding and adding and adding!Tried removeChild(myMovieClip), this.removeChild(...), this.parent.removeChild(...), but none work. I'm missing something really simple here, aren't I?Here's the code for SoundBeat.as:

Code:
package {
import flash.display.Bitmap;

[code].....