Auto refresh xml data in flash

programming flash
1 
function LoadXML(loaded) {
     if (loaded) {
         _root.kul_ad.text = this.firstChild.firstChild.childNodes[0].nodeValue;
         _root.kul_kalyon = this.firstChild.childNodes[1].firstChild.nodeValue;
         _root.kul_kadirga.text = this.firstChild.childNodes[2].firstChild.nodeValue;
         _root.kul_puan.text = this.firstChild.childNodes[3].firstChild.nodeValue;
     }
 }
 xmlData = new XML();
 xmlData.ignoreWhite = true;
 xmlData.onLoad = loadXML;
 xmlData.load("xml.php");

I have swf get values from a xml.
I want:
when I send a change to xml, flash will detect that automatically


myLoadInteval = setInterval(LoadFile, 2000);
function LoadFile() {
    xmlData.load("xml.php");
}

didn’t work