Flash Game Score not working AS3, please help?

Question

So Im creating a game and all I wanted to add was a counter that increments constantly until a player loses the game.
I created my score class and it looks like this:
package
    import flash.display.MovieClip;
    import flash.display.Stage;
    import flash.text.TextField;
    import flash.events.Event;
    import flash.utils.Timer;
    import flash.events.TimerEvent;
    public class Score extends MovieClip
        public var second:Number = 0;
        public var timer:Timer = new Timer(10);
        private var stageRef:Stage;
        public function Score(stageRef:Stage)
            x = 537.95;
            y = 31.35;
            this.stageRef = stageRef;
            timer.addEventListener(TimerEvent.TIMER, clock);
            timer.start();
        function clock(evt:TimerEvent):void
            second += 1;
            scoreDisplay.text = String("Score: " +second);
and this is my engine class that adds it to the stage:
package  {
//list of our imports these are classes we need in order to
//run our application.
import flash.display.MovieClip;
import flash.display.Stage;
import flash.events.Event;
public class Engine extends MovieClip{
    private var enemyList:Array = new Array();
    private var ourBoat:Boat;
    private var score:Score;
    public function Engine() : void{
        //create an object of our ship from the Ship class
        ourBoat = new Boat(stage);
        score = new Score(stage);
        //add it to the display list
        stage.addChild(ourBoat);
        stage.addChild(score);
So that creates a timer on the stage and continuously increments, but when I compile, I get no errors and my timmer for some reason doesn't work, it just displays random numbers, please help! If there is a better way of doing this please enlighten me.

Answer 1

When I said it continuosly increments, I meant thats the function I was looking to do. The file compiles fine with no errors, but when you look at the textbox where im displaying the timer it flickers strangely and shows random numbers as if its crashed or that its not working properly just a load of 1's and 0's. I even tried changing the miliseconds to 1000ms it still does the same thing.