fill listbox from mysql data

hi everyone.  heres my question:  i want to fill a listbox with data from a MySql table.  the code ive gotten working is for static data from an xml file.  here it is:

     var options:XML = new XML();
options.ignoreWhitespace = true;
var loader:URLLoader = new URLLoader(new URLRequest("fillRegions.xml"));
loader.addEventListener("complete",function(event){
    options = new XML(loader.data);
    var myRegion = options.region;
    for(var i in myRegion ){;
        select.addItem({label:myRegion .name});
    };
});

var select = new List();
regionList.addChild(select);

where the xml file looks like this:

<?xml version="1.0" ?>
<tblregions>
<region><name>Africa</name></region>
<region><name>Asia</name></region>
<region><name>The Caribbean</name></region>
<region><name>Central America and Mexico</name></region>
<region><name>Eastern Europe and Central Asia</name></region>
<region><name>North Africa</name></region>
<region><name>The Middle East</name></region>
<region><name>The Pacific Islands</name></region>
<region><name>South America</name></region>
</tblregions>

now id like to make this dynamic by pulling the data from a Mysql table.  i use a php file to pull the data and echo it as an xml output.  here that is:

<?php
error_reporting(0);
session_start();
include 'db_connect.php';

$result = mysql_query("Select * from tblregions");


echo ('<?xml version="1.0" ?>');
echo ("</br>");
echo ("<root");
echo ("</br>");
echo ("<tblregions>");
    echo ("</br>");

while($rows = mysql_fetch_assoc($result)){
echo ("<region>");
echo ("</br>");
echo ("<name>". $rows['RegionName'] . "</name>\n");
echo ("</br>");
echo ("</region>");
echo ("</br>");
}
echo ("</br>");
echo ("</tblregions>");
echo ("</root");
?>

this creates an echod file that looks just like the above xml example.  so, how do i change my original AS3 code to pull data from this php file rather then the xml file? thanks for your help

jason