CS4/AS3 gTween & bitmapData - HELP!!!

[flashpipe1]

I'm using Grant Skinner's gTween and need to capture the tweened clip using bitmapData, but can't figure out how to make it work!!

Here's the code, and I attached a sample...

//importing packages--------------------------
import flash.events.MouseEvent;
import flash.display.Bitmap;
import flash.display.BitmapData;

import com.gskinner.motion.GTweeny;
import fl.motion.easing.*;

//var----------------------------------------------
var myBitmapData:BitmapData=new BitmapData(draw_mc.width,draw_mc.height);

//Capture function---------------------------------
function capture(event:Event) {
	myBitmapData.draw(draw_mc);
	var bmp:Bitmap=new Bitmap(myBitmapData);
	this.addChild(bmp);
	draw_mc.visible=false;
	bmp.x=draw_mc.x;
	bmp.y=draw_mc.y+draw_mc.height;
}
function click_Handler(event:MouseEvent) {
	capture(event);
}
but.addEventListener(MouseEvent.MOUSE_DOWN, click_Handler);

//rotate function
stage.addEventListener(Event.ENTER_FRAME,handleTick);
function handleTick(evt:Event):void {
	draw_mc.rotationY += ((mouseX-150)*+0.2 - draw_mc.rotationY)*0.45;
}