pay/pause during video play

i wrote this code for video play/pause through SPACE key

play/pause is fine. But not visible play_button when i press SPACE key.

how to write that ?

stage.addEventListener(KeyboardEvent.KEY_DOWN, pausePress);
function pausePress(e:KeyboardEvent):void{
if (e.keyCode == 32){
          ns.togglePause();
          } 
}