Трабл с ремувом

[Greben]

Проблема такова - не запускается сточка this.removeMovieClip();

var grad = 0;
var step = 0.25;
var rad = 10;
var dep = 1;
ball_mc.radMove = function() {
	grad += (step/Math.PI*180)/50;
	this._x += Math.cos(grad)*rad;
	this._y += Math.sin(grad)*rad;
	rad -= 1;
	if (rad<=0) {
		rad = 30;
	}
	this.duplicate();
};
ball_mc.duplicate = function() {
	dep += 1;
	var dupe = this.duplicateMovieClip("dupe"+dep, dep++);
	dupe.onEnterFrame = this._parent.deleteIT();
};
function deleteIT() {
	this._xscale -= 2;
	this._yscale -= 2;
	if (this._xscale<=0) {
		this.removeMovieClip();
	}
}
ball_mc.onEnterFrame = ball_mc.radMove;