Document class Error #2136

Question

Hi, in Flash CS3 I've this DocumentClass:
package {
    import flash.display.MovieClip;
    public class DocumentClass extends MovieClip {
        public function DocumentClass() {
            trace("document class created");
This actually works, but I want to have the possibility to re-instance the DocumentClass (because I want to restart a game and the Main class is the DocumentClass).
In the first frame I have:
import flash.events.MouseEvent;
btn.addEventListener(MouseEvent.MOUSE_DOWN, restart);
function restart(evt:MouseEvent){
    var d = new DocumentClass();
But this code (I simplified my situation, but the result is the same) throws an error:
Error: Error #2136: The SWF file  file:///E|/Documents%20and%20Settings/Pepper/My%20Documents/FlashDevelopment/PepperGame.s wf  contains invalid data at DocumentClass/restart()/frame1()
What can I do to restart my game by calling the DocumentClass point of entry? Is this possibile?
Regards and thanks to everybody.

Answer 1

When you apply a DocumentClass to an FLA, the code becomes a part of that document (just like putting the code on the first frame of the timeline).  You aren't able to say "new DocumentClass()" in your code because it's essentially telling your application to create itself.  Instead, you have two options.  Firstly, add a function in your DocumentClass called "reset".  Add in this function all the things that need to be reset (score, lives, position of objects).  When you want to start the game over, you can just call the reset() function.
If you really want to "refresh" the whole SWF, you'll want to build a second SWF (a "shell") that acts as a container for your game.  It would basically just load in the game SWF (and maybe save any global information).  When you want to restart the game, just reload the SWF.