ActionScript 3.0 :: Calling Function When Enter Key Pressed

I have a function with the name "result". It's two textfields where you can input some data. I have an addEventListener with a mouse Click to that function. So when I click on my button It starts the function. But I want to call the same function when you press the enter key. So the result will be the same no matter if you click on the button or just press the enter key. This is what I have tried but It doesn't work. I guess I should write my function name "result" somewhere.

this.stage.addEventListener(KeyboardEvent.KEY_DOWN, enterfunc);
function enterfunc(event : KeyboardEvent) : void{
if (event.keyCode == Keyboard.ENTER){
submit();
}}