Help me debug this.. what this means?

1

hello,

so because to debug my error Error #1009 make some class.
So heir is the class
[AS]package portfolioClasses{
import flash.display.Stage;
import flash.display.MovieClip;

public class order extends MovieClip {
    public function order():void {
        trace("order plz ");
        trace(stage.stageWidth);
    }
}

}
[/AS]

In stage timeline write
[AS]import portfolioClasses.order;
stop();

new order();[/AS]

and linkage one MovieClip which is on stage.

Here is the output

order plz
800
order plz
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at portfolioClasses::order$iinit()
at portfolio_fla::MainTimeline/portfolio_fla::frame2()

first message come from the movieclip I link, second is from my AS write in the timeline, why for linkage work and for timeline not??? What this means…