Trouble using Timer

I’m new to ActionScript 3.0.

I am writing code that grabs data from an external XML file and displays it in dynamic text fields. The data is weather data gathered from a weather station. The data is processed by a local server and the owner wants a generic Flash app developed to display this. Right now, I’m just beginning the design and wanted to get some coding basics down before I got in too far over my head.

Right now, I can get the data pulled in and displayed just fine. But I cannot get the data to refresh automatically every 10 seconds. The XML file is updated each second, but I want the app to pull data every 10 seconds. I can only get the first pull.

Here is the code I’ve got so far:

var navData:XML;

function GetWeather()
{
var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, onComplete, false, 0, true);
loader.addEventListener(IOErrorEvent.IO_ERROR, onIOError, false, 0, true);
loader.load(new URLRequest("http://www.lehiweather.com/weather/flash2.jsp"));

function onComplete(evt:Event):void {
    XML.ignoreWhitespace = true;
    try {
        navData = new XML(evt.target.data);
        loader.removeEventListener(Event.COMPLETE, onComplete);
        loader.removeEventListener(IOErrorEvent.IO_ERROR, onIOError);
    
        var logTime:String = navData.log_time;
        var windDir:String = navData.wind_dir;
        var windDeg:String = navData.wind_degrees;
        logTime_txt.text = logTime;
        windDir_txt.text = windDir;
        windDeg_txt.text = windDeg;

    } catch (err:Error) {
        trace("Could not parse loaded content as XML:
" + err.message);
    }
}

function onIOError(evt:IOErrorEvent):void {
    trace("An error occurred when attempting to load the XML.
" + evt.text);
}
}
GetWeather(); // First time

var datarefreshTimer:Timer = new Timer(10000, 0);
datarefreshTimer.addEventListener(TimerEvent.TIMER, GetWeather);
datarefreshTimer.start();

What am I missing here? Also, if there are some extra bits in there that I don’t need to accomplish what I’m doing, please let me know.

Thanks!
-GRR