Action Script 3 Timer Not Stopping - actionscript-3

Question

Okay, so I am a very amateur AS3 programmer. I have a timer setup, and after 45 seconds it should move to scene 6, however if it calls hitTestObject, it should stop and reload from 0 when the scene reloads. EDIT: I know this code is probably really bad coding, I'm also taking tips on how to fix this code up. Here's my code:
var myTimer:Timer = new Timer(1000, 1); // 1 second
myTimer.addEventListener(TimerEvent.TIMER, onEnterFrame);
myTimer.start();
{MAIN FUNCTION}
function onEnterFrame(e:Event):void {
var startTime:int=getTimer();
var currentTime:int=getTimer();
trace(currentTime);
if (currentTime>45000){
gotoAndStop(1, "Scene 6");
}
}
My issue, is that the timer keeps running when it hits test object and so when scene 3 is reloaded, the timer just keeps going. Therefore you only have to play for a total of 45 seconds, no matter how many times you die. It should be that once you die the timer reloads when you reload scene 3. Any ideas on what I can do?

Answer 1

Hope this helps:
var myTimer:Timer;
function resetTimer():void
{
// check if timer already initialize
if(myTimer != null)
{
// just reset
myTimer.stop();
myTimer.reset();
}
else
{
// initialize timer and set a 45 sec delay;
myTimer = new Timer(45*1000,1);
myTimer.addEventListener(TimerEvent.TIMER, handleTimerTick);
}
myTimer.start();
}
function handleTimerTick(event:TimerEvent):void
{
// stop and null timer;
myTimer.stop();
myTimer.removeEventListener(TimerEvent.TIMER, handleTimerTick);
myTimer = null;
// goto my 6th scene
gotoAndStop(1, "Scene 6");
}
// whenever a hit test is performed and a timer reset is needed just call
resetTimer();