trouble reading xml.php file

I am attempting to integrate the PHP calendar script mentioned in this post:
http://www.interactivetools.com/iforum/Products_C2/CMS_Build
er_F35/gforum.cgi?post=74229;search_string=calendar;t=search
_engine#74229

This calendar script gets its data from an xml file.

Viewing the xml file at it's address it appears to be bringing in data from CMS Builder database, but I've not been able to get the PHP calendar page that calls the xml file to display the CMS data.

In the calendar script, the name of the xml file is referenced as:
calendar.xml

I have changed that to match the xml file name:
calendar.xml.php


Here's my XML code:

<?php header('Content-type: application/xml; charset=utf-8'); ?>
<?php
require_once "/vservers/mydomain/htdocs/cmsAdmin/lib/viewer_functions.php";
list($calendarRecords, $calendarMetaData) = getRecords(array(
'tableName' => 'calendar',
));
?>
<?php echo '<?xml version="1.0" encoding="UTF-8"?>'; ?>
<calendar>
<?php foreach ($calendarRecords as $record): ?>
<event>
<date><?php echo date("Y-m-d", strtotime($record['date'])) ?></date>
<title><?php echo $record['title'] ?></title>
<url><?php echo $record['url'] ?></url>
</event>
<?php endforeach; ?>
</calendar>


When I view source of the xml.php file in my browser I see this, which is correct:

<?xml version="1.0" encoding="UTF-8"?><calendar>
<event>
<date>2009-10-26</date>
<title>My Event</title>
<url>http://www.test.com</url>
</event>
</calendar>


Any tips or advice would be much appreciated. If I could get this to work, it would make my week!

Deborah