Newly created objects don't render in Flash - actionscript-3

Question

I'm just learning Flash/Actionscript 3 and I'm trying to create a new object using an object already placed in the scene, and this is the code for it:
package
{
import flash.display.MovieClip;
import flash.events.MouseEvent;
public class Scene1 extends MovieClip
{
{
{
{
var theRoot:MovieClip = MovieClip(root);
var mouse:mouse1 = new mouse1();
//Scene1(void);
//onClipEvent(30);
function Scene1():void
{ this.addEventListener(MouseEvent.MOUSE_MOVE, Joe);
}
public function Joe(event:MouseEvent):void
{
mouse.x = mouseX;
mouse.y = mouseY;
mouse.x = 160;
mouse.y = 160;
trace(mouse.x + " " + mouse.y + " " + mouse.z);
}
}
}
}}};
It does trace the position as it should be (160,160), bu object doesn't render, even if I change Z.. although, there aren't any objects that would be blocking it in their view anyway.
This is mouse1:
package
{
import flash.display.MovieClip;
import flash.events.MouseEvent;
public class mouse1 extends MovieClip
{
{
{
var theRoot:MovieClip = MovieClip(root);
mouse1(void);
//onClipEvent(30);
function mouse1():void
{
//this.z = -20;
trace("WROKZZZ");
}
public function Joe(event:MouseEvent):void
{
//this.x = mouseX;
//this.y = mouseY;
}
}
}
}};

Answer 1

As well as creating the object with new, it needs to be added to the display list (see here: http://www.adobe.com/devnet/flash/quickstart/display_list_programming_as3.html) before it is rendered, so use stage.addChild(mouse) to do this.