Streaming Xmoov -> video not found

We had implemented the jw-player succesfully on our site. But our customers want to fast forward the movie, so I added the xmoov script.

On our test site http://www.class-3some.com/cctrial/index.html, I get the remark "video not found -url-", but when I direct the url from the browser http://www.class-3some.com/cctrial/player/4.flv, I can download the movie itself....

Xmoov.php, without the comments:

<?php

define('XMOOV_PATH_ROOT', '');
define('XMOOV_PATH_FILES', './');

define('XMOOV_CONF_LIMIT_BANDWIDTH', FALSE);
define('XMOOV_CONF_ALLOW_FILE_CACHE', TRUE);

define('XMOOV_BW_PACKET_SIZE', 90);
define('XMOOV_BW_PACKET_INTERVAL', 0.3);
define('XMOOV_CONF_ALLOW_DYNAMIC_BANDWIDTH', TRUE);

define('XMOOV_GET_FILE', 'file');
// define('XMOOV_GET_POSITION', 'pos'); // v3.x player
define('XMOOV_GET_POSITION', 'start'); // v4.x player
define('XMOOV_GET_AUTHENTICATION', 'key');
define('XMOOV_GET_BANDWIDTH', 'bw');

if(isset($_GET[XMOOV_GET_FILE]))
{
$seekPos = isset($_GET[XMOOV_GET_POSITION]) ? intval($_GET[XMOOV_GET_POSITION]) : 0;
$fileName = htmlspecialchars($_GET[XMOOV_GET_FILE]);

$file = XMOOV_PATH_ROOT . XMOOV_PATH_FILES . $fileName;

$packet_interval = (XMOOV_CONF_ALLOW_DYNAMIC_BANDWIDTH && isset($_GET[XMOOV_GET_BANDWIDTH])) ? getBandwidthLimit('interval') : XMOOV_BW_PACKET_INTERVAL;
$packet_size = ((XMOOV_CONF_ALLOW_DYNAMIC_BANDWIDTH && isset($_GET[XMOOV_GET_BANDWIDTH])) ? getBandwidthLimit('size') : XMOOV_BW_PACKET_SIZE) * 1042;

if (!file_exists($file))
{
print('<b>ERROR:</b> xmoov-php could not find (' . $file . ') please check your settings.');
exit();
}

if(file_exists($file) && strrchr($fileName, '.') == '.flv' && strlen($fileName) > 2 && !eregi(basename($_SERVER['PHP_SELF']), $fileName) && ereg('^[^./][^/]*$', $fileName))
{
$fh = fopen($file, 'rb') or die ('<b>ERROR:</b> xmoov-php could not open (' . $file . ')');

$fileSize = filesize($file) - (($seekPos > 0) ? $seekPos + 1 : 0);

if(!XMOOV_CONF_ALLOW_FILE_CACHE)
{
session_cache_limiter("nocache");
header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");
}

header("Content-Type: video/x-flv");
header("Content-Length: " . $fileSize);

if($seekPos > 0)
{
print('FLV');
print(pack('C', 1));
print(pack('C', 1));
print(pack('N', 9));
print(pack('N', 9));
}

fseek($fh, $seekPos);

while(!feof($fh))
{

if(XMOOV_CONF_LIMIT_BANDWIDTH)
{
list($usec, $sec) = explode(' ', microtime());
$time_start = ((float)$usec + (float)$sec);
print(fread($fh, $packet_size));
list($usec, $sec) = explode(' ', microtime());
$time_stop = ((float)$usec + (float)$sec);
$time_difference = $time_stop - $time_start;
if($time_difference < (float)$packet_interval)
{
usleep((float)$packet_interval * 1000000 - (float)$time_difference * 1000000);
}
}
else
{
print(fread($fh, 16384));
}
}
}
}

function getBandwidthLimit($part)
{
switch($part)
{
case 'interval' :
switch($_GET[XMOOV_GET_BANDWIDTH])
{
case 'low' :
return 1;
break;
case 'mid' :
return 0.5;
break;
case 'high' :
return 0.3;
break;
default :
return XMOOV_BW_PACKET_INTERVAL;
break;
}
break;

case 'size' :
switch($_GET[XMOOV_GET_BANDWIDTH])
{
case 'low' :
return 10;
break;
case 'mid' :
return 40;
break;
case 'high' :
return 90;
break;
default :
return XMOOV_BW_PACKET_SIZE;
break;
}
break;
}
}

I already tried to change the url for the movie to a shorter version, same problem....

Can someone help me with this?
Ow yes, we have a licensed jw-player.

Greetings

Cindy