Fscommand showmenu bug?

1

I’m using Flash CS5 and I created a fla file with an external as3, where it says:

    import flash.display.MovieClip;
     import flash.events.Event;
    import flash.system.fscommand;
     import flash.display.Stage;
    
    public class map extends  MovieClip {
        
        public function map() {
             addEventListener(Event.ADDED_TO_STAGE, init);
        }
 
         private function init(event:Event):void {
             removeEventListener(Event.ADDED_TO_STAGE, init);
             trace("Starting...");
            fscommand("showmenu", "false");
         }
        
    }

I’m able to compile the file and see “Starting…” message but the player window still has its menu with " File | View | Control | Debug " options.
This fscommand doesn’t work in player 9 and player 10.

Is it a known bug?

Some people suggested using “stage.showMenu = false;” but in fact, stage object doesn’t have “showMenu” property and it produces an error.