ActionScript 3.0 :: Even Copying Script Verbatim Brings Errors

I have copied ActionScript 1:1 - Create a Clock (episode 15) with Doug Winnie word for word and still I'm getting errors. /*create a timer that could do something every second 60 times*/
 
var clockTimer:Timer = new Timer(1000, 60);
 
/*add an event listerer to the button that will call the startTimer function*/ 
startButton.addEventListener(MouseEvent.CLICK, startTimer);
/*add event listeners for the timer*/ 
clockTimer.addEventListener(TimerEvent.TIMER, moveHand);clockTimer.addEventListener(TimerEvent.TIMER_COMPLETE, endTimer);

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