ActionScript 3.0 :: Flash Game - Making Collision Between 2 Objects

Mar 16, 2010

I am having a problem with my collision game. When I try to make collision between 2 objects, this occurs: TypeError: Error #1009: Cannot access a property or method of a null object reference. at Level$iinit().

Here is my PHP Code:
package {
import flash.display.*;
import flash.events.Event;
import flash.geom.Point;
import flash.events.Event;
import flash.events.MouseEvent;
public class Level1 extends MovieClip {
[Code] .....
My flash file is at [URL].

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