Xml data undefined in flash

Hi everyone,

I am trying to load a xml file which was created by a php-file into flash.
the problem is, it works when I open it in a browser but not in flash>export or in a standalone player. When I load a .xml file its okay, but not the .php

Any ideas?

AS:

function loadXML(loaded) {
	if (loaded) {
		_root.inventor = this.firstChild.childNodes[0].childNodes[0].firstChild.nodeValue;
		_root.comments = this.firstChild.childNodes[0].childNodes[1].firstChild.nodeValue;
		date_txt.text = _root.inventor;
		comment_txt.text = _root.comments;
	} else {
		comment_txt.text = "loading";
	}
	
}
xmlData = new XML();
xmlData.ignoreWhite = true;
xmlData.onLoad = loadXML;
xmlData.load("pathto.php");

PHP:

 <?php
//header("Content-type: text/xml"); --> otherwise wouldn't work at all

require ( 'config.php' );

$linkID = mysql_connect($host, $user, $pass) or die("Could not connect to host.");
mysql_select_db($database, $linkID) or die("Could not find database.");

$query = "SELECT * FROM cons_test ORDER BY date DESC";
$resultID = mysql_query($query, $linkID) or die("Data not found.");

$xml_output = "<?xml version=\"1.0\"?>
";
$xml_output .= "<entries>
";

for($x = 0 ; $x < mysql_num_rows($resultID) ; $x++){
	$row = mysql_fetch_assoc($resultID);
	$xml_output .= "	<entry>
";
	$xml_output .= "		<date>" . $row['date'] . "
";
		// Escaping illegal characters
		$row['comment'] = str_replace("&", "&", $row['comment']);
		$row['comment'] = str_replace("<", "<", $row['comment']);
		$row['comment'] = str_replace(">", ">", $row['comment']);
		$row['comment'] = str_replace("\"", """, $row['comment']);
	$xml_output .= "		<text>" . $row['comment'] . "
";
	$xml_output .= "	</entry>
";
}

$xml_output .= "</entries>";

echo $xml_output;

?>