Help ! keyboard Event error?

1

//variables
var hero:MovieClip;
var bg:MovieClip;
var Key:KeyObject = new KeyObject(stage);

stage.addEventListener(Event.ENTER_FRAME,moveCharacter);

hero.gotoAndStop(‘idle’);
bg.visible = true;
//character Movements
hero.scaleX=-1;

function moveCharacter(e:Event):void
//function onenter(keyEvent:KeyboardEvent):void
{

if(Key.isDown(Key.RIGHT))
	{
	hero.x+=5;
	hero.scaleX=-1;
	hero.gotoAndStop('walking');
	}
	
else if(Key.isDown(Key.LEFT))
 	{
	hero.x-=5;
	hero.scaleX=1;
	hero.gotoAndStop('walking');
	}
	
else if(Key.isDown(Key.UP))
 	{
	hero.y-=30;
	hero.y+=30;
	hero.gotoAndStop('jump');
	}
else if(Key.isDown(Key.S))
	{
		hero.gotoAndStop('slash');
	}
else if(Key.isDown(Key.A))
	{
		hero.gotoAndStop('special');
	}
else if(Key.isDown(Key.D))
	{
		hero.gotoAndStop('thrust');
	}
else
	{
		hero.gotoAndStop('idle'); 
	}

}

function backScroll():void
{
if (hero.walking < stage.stageHeight)
{
back.x+=10;
}
}

help ! actually theres no error but the wrong is I have to press down the keys before it move, like slash. have to press keys for 2 seconds i guess… anyone can help me ???
thnks in advance !