problems loading 3d model using collada

hi, i have problems loading 3d model with collada plugin, the model doesnt appear and the output error message appear to me. Below is the output error message and the code i used to load the 3d model.
package
{
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;

import org.papervision3d.materials.BitmapFileMaterial;
import org.papervision3d.materials.BitmapMaterial;
import org.papervision3d.materials.ColorMaterial;
import org.papervision3d.materials.WireframeMaterial;
import org.papervision3d.materials.special.ParticleMaterial;
import org.papervision3d.materials.utils.BitmapMaterialTools;
import org.papervision3d.materials.utils.MaterialsList;
import org.papervision3d.objects.parsers.DAE;
import org.papervision3d.objects.primitives.Cube;
import org.papervision3d.objects.primitives.Sphere;
import org.papervision3d.objects.special.ParticleField;
import org.papervision3d.view.BasicView;

[SWF(width="1920", height="1200", backgroundColor="#000000", frameRate="30")]

public class SkyboxAnim extends BasicView
{
	
	[Embed (source= "../universe/front.jpg")]
	private var BitmapFront:Class;
	
	[Embed (source= "../universe/back.jpg")]
	private var BitmapBack:Class;
	
	[Embed (source= "../universe/top.jpg")]
	private var BitmapUp:Class;
	
	[Embed (source= "../universe/right.jpg")]
	private var BitmapRight:Class;
	
	[Embed (source= "../universe/left.jpg")]
	private var BitmapLeft:Class;
	
	[Embed (source= "../universe/bottom.jpg")]
	private var BitmapBottom:Class;
	
	[Embed (source= "../planet/earthmap.jpg")]
	private var BitmapEarth:Class;
	
	public var cube:Cube;
	public var earth:Sphere;
	public var value:int = 0;
	public var stars:ParticleField;
	public var shuttle:DAE;
	
	public function SkyboxAnim()
	{
		super(1920 , 1200,true,false);
		
		//declare bitmap materials and material list
		var materialsList:MaterialsList = new MaterialsList();
		var frontMat:BitmapMaterial = new BitmapMaterial(new BitmapFront().bitmapData);
		var backMat:BitmapMaterial = new BitmapMaterial(new BitmapBack().bitmapData);
		var topMat:BitmapMaterial = new BitmapMaterial(new BitmapUp().bitmapData);
		var bottomMat:BitmapMaterial = new BitmapMaterial(new BitmapBottom().bitmapData);
		var rightMat:BitmapMaterial = new BitmapMaterial(new BitmapRight().bitmapData);
		var leftMat:BitmapMaterial = new BitmapMaterial(new BitmapLeft().bitmapData);
		var earthbmp:BitmapData = new BitmapEarth().bitmapData;
		var earthmat:BitmapMaterial = new BitmapMaterial(earthbmp);
		
		//sides of the material
		frontMat.doubleSided = true;
		backMat.doubleSided = true;
		rightMat.doubleSided = true;
		topMat.doubleSided = true;
		leftMat.doubleSided = true;
		bottomMat.doubleSided = true;
		
		//add bitmap materials to material list
		materialsList.addMaterial(frontMat,"front");
		materialsList.addMaterial(backMat,"back");
		materialsList.addMaterial(topMat,"top");
		materialsList.addMaterial(bottomMat,"bottom");
		materialsList.addMaterial(rightMat,"right");
		materialsList.addMaterial(leftMat,"left");
		
		//cube propoerties
		cube = new Cube(materialsList, 1000,1000,1000,5,5,5);
		
		//star field properties
		stars = new ParticleField(new ParticleMaterial(0XFFFFFF,1,ParticleMaterial.SHAPE_CIRCLE),2000,2,500);
		
	    //add child for stars
		scene.addChild(stars);
		
		//add child for cube
		scene.addChild(cube);
		
		earth = new Sphere(earthmat,1000,20,18);
		
		scene.addChild(earth);
		
		[b]//load dae
		shuttle = new DAE();
        shuttle.load("universe/shuttle.dae");
		shuttle.scale = 0.05;
		shuttle.x = 300;
		scene.addChild(shuttle);[/b]
		
		//camera fov
		 camera.fov = 90;
	     camera.z= 0;
		
		//add event listener
		addEventListener(Event.ENTER_FRAME,rotateCube);
	
	}
	
	public function rotateCube(e:Event):void
	{
		earth.yaw(0.2);
		camera.yaw((viewport.containerSprite.mouseX) * 0.002);
		camera.pitch((viewport.containerSprite.mouseY) * 0.002);
		
		singleRender();
	}
}

}