include security

I'm sure this is a security protocol problem I can switch off. My installation works:
http://www.stfrancisdistrict.qc.ca/calendar/calendar.php
But when I try to include it on:
http://www.stfrancisdistrict.qc.ca/index.html nothing happens.
include("/home/***/calendar/calendar.php");
Where is the switch?

To follow it up, I can get the calendar to display, but any other PHP I try to run after it does not display. It is as if your code kills any further instance of PHP.
http://www.stfrancisdistrict.qc.ca/

If I include something before, I get these errors in Apache.

[Fri Feb 2 17:09:21 2007] [error] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/***/public_html/calendar/items.php:24) in /home/***/public_html/calendar/private/ltwdisplaymonth.php on line 142
[Fri Feb 2 17:09:21 2007] [error] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/***/public_html/calendar/items.php:24) in /home/***/public_html/calendar/private/ltwdisplaymonth.php on line 143
[Fri Feb 2 17:09:21 2007] [error] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/***/public_html/calendar/items.php:24) in /home/***/public_html/calendar/private/ltw_header.php on line 9
[Fri Feb 2 17:09:21 2007] [error] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/***/public_html/calendar/items.php:24) in /home/***/public_html/calendar/private/ltw_header.php on line 10

I created item.php to do this:

<?php

$myconnection = mysql_connect($server,$user,$pass);
mysql_select_db($db,$myconnection);

$now = strtotime('yesterday');
$future = strtotime('+ 30 days');

$sql = "select * from `jtjohnston_stfrancis`.`events` order by `event_date`";
#echo $sql."<br>".$now."<br>".$future;

$news = mysql_query($sql) or die(print mysql_error());

while ($mydata = mysql_fetch_object($news))
{
$updated = strtotime($mydata->event_date);
if (($updated >= $now) and ($updated <= $future))
{
echo "<b>$mydata->name</b> (".date("l, F j, Y", strtotime($mydata->event_date)).")<br>.$mydata->event_date ($mydata->start_time))n<blockquote>".nl2br($mydata->description)."n<br>$mydata->location</blockquote><hr size=1>n";
}
}
mysql_close($myconnection);
?>

I figure there is a die command in here. I have fixed the header problem by commenting yours out.
I don't want to comment out die commands, unless I have to.

Problem fixed. it was your html. This line in ltwfooter.php must finish with "-->"

<!-- Close the table cell & row it is in -->

WHAT IS GOING ON HERE?!

*CONFUSED FACE*