External.php RSS headers aren't right?

[sarahk]

I've got a new vBulletin install sitting on a Mambo site. I'm trying to use Mambo's rss parser to show the last x posts. Should be straight forward right!?

• If I add it to Mambo it gets nothing
• If I call up external.php?type=rss I can see the unformatted feed in my browser, looks fine
• If I save the unformatted feed as a text file with a .xml extension and add it to Mambo it works

So I was wondering if external.php was sending the wrong headers?

	header('Content-Type: text/xml');
	header('Expires: ' . gmdate('D, d M Y H:i:s') . ' GMT');
	header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
	header('Pragma: public');

Any ideas on what to do?