Help a newbie with Keyboard events

Question

Right so I'm just getting started with ActionScript (and Flash) and I'm getting a bit confused. I've got quite a bit of experience programming in other languages but I've never touched either actionscript or flash before.
I've got various books and have tried searching around the internet but I can't find anything to help me with this problem... it looks to me like it SHOULD work (but obviously I'm wrong because it doesn't!) I'm just trying to get the base for a game set up, and want to be able to take in user input via the keyboard (I will want mouse control as well, but let's focus on this problem first).
My code is:
package {
    import flash.display.MovieClip;
    import flash.events.*;
    import flash.ui.Keyboard;
    public class Main extends MovieClip
        var isRunning:Boolean = true;
        public function Main()
            trace("Flash Project!");
            Initialize();
            //Game Loop
            while(isRunning)
                Update();
            trace("Exiting...");
        public function Initialize():void
            trace("Initializing!");
            stage.addEventListener(KeyboardEvent.KEY_DOWN, OnKeyPressed);
        public function Update():void
            trace("Updating...");
        public function OnKeyPressed(evt:KeyboardEvent):void
            switch (evt.keyCode)
                case Keyboard.ENTER:
                    trace("Enter!");
                    break;
                case Keyboard.ESCAPE:
                    isRunning = false;
                    break;
                case default:
                    trace("keyCode: ", event.keyCode);
                    break;
The errors it is generating refer to the OnKeyPressed function, and say that I have tried to access the undefined properties Keyboard, escape and default. I thought I imported all the keyboard stuff at the top? Help would be much appreciated here, I'll be fine once I'm up and running but at the moment I'm feeling somewhat lost.

Answer 1

Right, well at least part of my problem was that I had
trace("keyCode: " event.keyCode);
instead of
trace("keyCode: " evt.keyCode);
but it still doesn't like the word "default"? This is strange as it's coming up in blue so it's obviosly recognising it as a keyword...
If I comment out the 'default' section of te switch case statement it get's stuck in an infinite loop, even if I press escape... which should set 'isRunning' false therefore exiting the loop...
Help!