How to Create SimpleButton with Default View

programming flash
1

Hi, I want to create default view SimpleButton in my class file. But when I test my movie I’m seeing that my code doesn’t show anything.

package {
    ...
    import flash.display.SimpleButton;
    public class MainGraphics extends Sprite
    {
        ...
        private var meter_btn:SimpleButton = new SimpleButton();
        public function CreateArea()
        {
            // constructor code
            this.addEventListener(Event.ADDED_TO_STAGE, init);
        }
        public function init(event:Event)
        {
            ...
            addChild( meter_btn );
            ...
        }
        ...
    }
}

This code shows no button and no errors. I don’t know what to set upState, overState, downState and hitTestState.

What I mean by saying default view is the view of the button when we drag a component to the library. This mustn’t be so hard. Sorry for my English.