ActionScript 3 - Reseting timer every frame (Quiz) - actionscript-3

Question

I have been attempting to create a simple quiz in which you chose an answer, play right / wrong animation, then let you choose another question. Each question frame gives you 30 seconds to choose an answer and then forwards you to the "time is up" frame. Pretty simple. So far, everything has been working smooth except the timer. I can get it to work within a single frame, but when u click a button or for some other reason get re-directed to another frame, it crashes the whole program.
I theorized I can fix that by stoping the timer at "exit frame event", however that only prevented the timer from even starting (while the rest of the program continued to work smoothly);
Posting the code may and WILL not be enough so check the file out for yourself:
http://www.filedropper.com/semifinalsq
I need this for a school quiz and I haven't been able to find anything on the internet for days. I may possibly have multiple errors or errors in the way I've 'graphically' constructed and linked the whole thing, in which case I cannot fix it without somebody taking a look at the whole program.
If you can make anything from the code of only 1 frame:
import flash.events.TimerEvent;
import flash.utils.Timer;
var myTimer:Timer = new Timer(1000);
myTimer.addEventListener(TimerEvent.TIMER, countdownHandler);
function countdownHandler(event:TimerEvent):void{
countdown.text = 30-myTimer.currentCount+" s";
if(myTimer.currentCount==30){gotoAndStop(5)}
}
This is my timer code, where frame 5 is the "time is up" frame. This bit works perfectly, but how do I build upon it so it resets whenever a new frame with a timer is entered? (So, how do I stop it and restart it in certain frames?);
Help would be much appreciated!

Answer 1

Solution:
myTimer.stop();
myTimer.removeEventListener(TimerEvent.TIMER, countdownHandler);
Added within the function called by the buttons. Since it is a quiz, the answers are buttons and lead to another frame, while previously stopping the timer and removing it's listener (code above goes before 'goto' frame and stop ... );
Although this may not help in other situations, for a quiz of similar structure it is a pretty simple solution.
Special thanks to user LDMS