Stop image flickering

Question

I'm trying below script to display image with XML updated status checking.
But image flickering every 2sec.
how can i stop flickering without stop Timer.
var sampleId:Number = 100;
var myXML:XML;
var myLoader:URLLoader = new URLLoader();
var myTimer:Timer = new Timer(5000);
myTimer.addEventListener(TimerEvent.TIMER, timerListener);
myTimer.start();
function timerListener(e:TimerEvent):void
          trace("Timer is Triggered");
          var myLoader:URLLoader = new URLLoader();
          myLoader.load(new URLRequest("xmlfile.xml"));
          myLoader.addEventListener(Event.COMPLETE, processXML);
function processXML(e:Event):void
          myXML = new XML(e.target.data);
          for (var i:uint=0; i<myXML.*.length(); i++)
                    if (myXML.Message[i].@EventId == sampleId)
                              //trace(myXML.Message[i]);
                              if (myXML.Message[i] == "Welcome")
                                   msgLoader.load(new URLRequest("http://www.website.com/images/image1.jpg"));
                                   addChild(msgLoader);
                              if (myXML.Message[i] == "Completed")
                                   msgLoader.load(new URLRequest("http://www.website.com/images/image2.jpg"));
                                   addChild(msgLoader);

Answer 1

sorry i type wrong previous code, & not 2sec, every 5sec.
updated below.
var sampleId:Number = 100;
var myXML:XML;
var msgLoader:URLLoader = new URLLoader();
var myTimer:Timer = new Timer(5000);
myTimer.addEventListener(TimerEvent.TIMER, timerListener);
myTimer.start();
function timerListener(e:TimerEvent):void
     trace("Timer is Triggered");
     var myLoader:URLLoader = new URLLoader();
     myLoader.load(new URLRequest("xmlfile.xml"));
     myLoader.addEventListener(Event.COMPLETE, processXML);
function processXML(e:Event):void
     myXML = new XML(e.target.data);
     for (var i:uint=0; i<myXML.*.length(); i++)
     if (myXML.Message[i].@EventId == sampleId)
          //trace(myXML.Message[i]);
          if (myXML.Message[i] == "Welcome")
                    msgLoader.load(new URLRequest("http://www.website.com/images/image1.jpg"));
                    addChild(msgLoader);
               if (myXML.Message[i] == "Completed")
                    msgLoader.load(new URLRequest("http://www.website.com/images/image2.jpg"));
                    addChild(msgLoader);