Help with php rss feed please

Okay, I've created the following rss feed for my site, but I've obviously done something wrong because I keep getting a 500 Server Configuration Error

<?
header('Content-type: text/xml'); 
	include("PATH TO DATABASE CONNECTION FILE");
	mysql_select_db($database_conn, $conn);
?>

<rss version="2.0">
<channel>
<title>DirectoryGold Article Directory</title>
<description>Get free content for your website or submit your article for free</description>
<link>http://www.directorygold.com/more/article/</link>
<copyright>Copyright eGDC Ltd 2004-5</copyright>

<?
$getItems="SELECT id,title,name,UNIX_TIMESTAMP(dtcreated) AS dtcreated
FROM articles LIMIT 0,8 ORDER BY dtcreated DESC";
$doGet=mysql_query($getItems);

while($item=mysql_fetch_array($doGet))
 {
  $id=$doGet['id'];
  $title=strip_tags($doGet['title']);
  $body=strip_tags($doGet['name']);
<!-- $body=substr($doGet['content'],0,150)); -->
  $pubDate=strftime("%a, %d %b %Y %T %Z",$doGet['dtcreated']);

  // output to client
	
?>

  <item>
  <title><?print htmlentities($title,'ENT_QUOTES');?></title>
  <description><?print htmlentities($body,'ENT_QUOTES');?></description>
  <link>http://www.directorygold.com/more/article/article_<?print $id;?></link> 
  <pubDate><?print $pubDate;?></pubDate>
  </item>

<? 
  } 
?>

</channel>
</rss>

Code (markup):

I've removed the path to the database connection file as I don't want to publish its' location in a public forum.

Can anyone tell me what I've done wrong please?