Hype objecpool with external class "clip"

1

I am trying to create a swarm behaviour with a papervision 3D cube, but to create an object pool i need to pass a Class, so i tried creating an external class “flyingCube”


		public function flyingCube() {
					 var cube = new Cube(null,240, 240, 240,1,1);
		}

and import it into my main


var pool:ObjectPool = new ObjectPool(flyingCube, 20);

i get this error


TypeError: Error #1009: Cannot access a property or method of a null object reference.
	at org.papervision3d.objects.primitives::Cube()
	at flyingCube()
	at hype.framework.core::ObjectPool/makeRandomObject()
	at hype.framework.core::ObjectPool/request()
	at Function/<anonymous>()
	..

what i am doing wrong (i am not an advanced coder so it could be obvious ^^)