I have the following code in one of my pages, I have used the footer.php code in many other of my scripts and it works fine. However, this script is the only one that uses an IFRAME. Is there a reason the "footer.php" script is not being shown?

Code:
<?php 
include($_SERVER["DOCUMENT_ROOT"] . "/mini/inc/dbconn.php");
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>AyrshireMinis.com - crmpicco</TITLE>
<script language="JavaScript" type="text/javascript" src="js/general.js"></script>
<link rel="stylesheet" type="text/css" href="/mini/inc/style.css" />
<link rel="shortcut icon" href="/favicon.ico" />
</HEAD>
<BODY>

<?php 
include($_SERVER["DOCUMENT_ROOT"] . "/mini/inc/general.php");
include($_SERVER["DOCUMENT_ROOT"] . "/mini/inc/header.php");
?>

<table class="main_table" border="0" cellpadding="5" cellspacing="5">
  <tbody>
    <tr>
      <td>
		  <table class="sec_table" border="0" cellpadding="0" cellspacing="0">
			<tbody>
			  <tr>
				<td valign="top" height="1300">
					<iframe frameborder="0" border="0" width="100%" height="100%" src="/mini/phpbb2/index.php" scrolling="no">
				</td>
			  </tr>
			</tbody>
		  </table>
      </td>
    </tr>
  </tbody>
</table>
<table align="center">
	<tr>
      <td width="100%" height="20">
	  <center>
		<?php include($_SERVER["DOCUMENT_ROOT"] . "/mini/inc/footer.php"); ?>
	  </center>
	  </td>
    </tr>
</table>
</BODY>
</HTML>
Cheers, Picco