actionscript 3 - How to get a time as a variable in Flash CS6

I am trying to get a time that is in a text document to become a variable in a Flash CS6 AS3 project. I can't seem to find where the problem is and the error messages aren't really helping. The highlighted parts are the changed lines.

Here is the newest code:

this.onEnterFrame = function()

{

var StartTime:URLLoader = new URLLoader();

StartTime.dataFormat=URLLoaderDataFormat.VARIABLES;

StartTime.addEventListener(Event.COMPLETE, onLoaded);

function onLoaded(e:Event):void {

}

StartTime.load(new URLRequest("ResponseTime.txt"));

var today:Date = new Date();

var currentTime = today.getTime();

var targetDate:Date = new Date();

var timeLeft = e.data - currentTime;

var sec = Math.floor(timeLeft/1000);

var min = Math.floor(sec/60);

sec = String(sec % 60);

if(sec.length < 2){

sec = "0" + sec;

}

min = String(min % 60);

if(min.length < 2){

min = "0" + min;

}

if(timeLeft > 0 ){

var counter:String = min + ":" + sec;

time_txt.text = counter;

}else{

    var newTime:String = "00:00";

    time_txt.text = newTime;


    delete (this.onEnterFrame);

}

}

Newest Error:

1120: Access of undefined property e. (Line 17).