AS3/ XML navigateToURL not opening the correct xml url

With this code my button which contains the navigateToURL function opens my browser to yahoo.com regardless of the url in the xml. Please review my code and let me know if you can see the problem.
Thanks for any help

//variables:
stop();
var xmlData:XML = new XML();
var picList:XMLList = new XMLList();
var currentPic:int = 0;
var myTimer:Timer = new Timer(5000);
var loader:URLLoader = new URLLoader();
var glow:GlowFilter = new GlowFilter();
var noglow:GlowFilter = new GlowFilter();
var url:XMLList = new XMLList();
var Request:URLRequest = new URLRequest(url);
 
//functions
function onComplete(e:Event):void {
        myTimer.start();
        xmlData = new XML(loader.data);
        picList = xmlData.image;
        url = xmlData.image.url;
        updatePic(currentPic);
}
 
//how the xml is parsed
function updatePic(index:int):void {
 
        if (picList[index].url == undefined) {
                txtBox_mc.getTix.visible = false;
                trace("button null");
        } else {
                txtBox_mc.getTix.visible = true;
                trace("button there");
        }
        txtBox_mc.getTix.url = picList[index].url;
        txtBox_mc.EventHeader.htmlText = picList[index].caption1;
        txtBox_mc.EventDate.htmlText = picList[index].caption2;
        txtBox_mc.EventPlace.htmlText = picList[index].caption3;
        trace(picList[index].url);
        trace(picList[index].caption1);
        trace(picList[index].caption2);
        trace(picList[index].caption3);
        trace(index);
}
 
//function from button CLICK
function GetUrTix(event:MouseEvent):void {
        navigateToURL(Request);
}
 
<!--XML-->
<?xml version="1.0" encoding="UTF-8" ?>
<slideshow>
 
        <image>
                <url>http://www.cubiccreative.com</url>
                <caption1>This is the show</caption1>
                <caption2>September 14-15</caption2>
                <caption3>Where Else</caption3>
        </image>
 
        <image>
        
                <caption1>What a Show</caption1>
                <caption2>August 14-15</caption2>
                <caption3>Where is It</caption3>
        </image>
 
        <image>
                <url>http://www.cubiccreative.com</url>
                <caption1>Jazz Hands</caption1>
                <caption2>December 14-15</caption2>
                <caption3>Tuen Left at the Sign</caption3>
        </image>
 
</slideshow>