XML and PHP - dynamic hell

I'm having one page output XML for other sites to parse. Unfortunately if I give an RSS parser the site (the php file) it errors out. But if I put the output in a XML file, and give that to the RSS parser everything works perfectly. Does anyone know why it can't read it straight from the php file? PHP Builder has it working, I have no idea why mine doesn't. Thanks Source: <? require "division/settings.inc"; require RootPath . "admin/Admin.php"; //these just define mysql logins and such echo "<" . "?xml version=\"1.0\"?" . ">\n"; echo "<!DOCTYPE rss PUBLIC \"-//Netscape Communications//DTD RSS 0.91//EN\" \"http://my.netscape.com/publish/formats/rss-0.91.dtd\">\n"; echo "<rss version=\"0.91\">\n"; echo "<channel>\n"; $query = mysql_query("Select * from " . PREFIX . "news order by Date Desc Limit 40"); while($results = mysql_fetch_array($query)) { echo "<item>\n"; echo "<title>" . stripslashes($results["Subject"]) . "</title>\n"; echo "<link>http://dod.stronger.org/</link>\n"; echo "<author>$results[Name]</author>\n"; echo "<description>" . substr(htmlspecialchars(stripslashes($results["News"])),0,150) . "...</description>\n"; echo "</item>\n"; } ?> </channel> </rss>