问PHP和XML: Dlvr.it不工作

EN

<?php
include('db.php');

header('Content-Type: text/xml');
echo '<?xml version="1.0" encoding="ISO-8859-1"?>  
<rss version="2.0">  
<channel>  
<title>MindWeather Thesis</title>  
<description>Latest News from my website</description>  
<link>http://www.mindweather.info</link>';  

$get_articles = "SELECT Fore_ID, Valid, Synopsis,
DATE_FORMAT(Issued,'%a, %e %b %Y %T') as formatted_date   
FROM tblforecast ORDER BY Issued DESC LIMIT 15";  

$articles = mysql_query($get_articles) or die(mysql_error());  

while ($article = mysql_fetch_array($articles)){  

    echo '  
       <item>  
          <title>'.$article['Valid'].'-hour Forecast</title>  
          <description><![CDATA['.$article['Synopsis'].']]> </description>  
          <link>http://mindweather.info/fforecast.php?fore='.$article['Fore_ID'].'</link>    
          <pubDate>'.$article['formatted_date'].' GMT</pubDate>  
      </item>';  
} 
echo '</channel>
</rss>';
?>