Install question

I want to install a script and have done a php script before BUT this one baffles me
First i get this error


Warning: fclose(): supplied argument is not a valid stream resource in /home/cruisepr/public_html/checker/LinkBack


It come with really no instuction and i made a folder and put it in there

When i call for it i get the error on the page

Am i not calling for it right or did i make the folder name wrong >>

here is script

//////////////////////////////////////////////////////////////////////////////
// Configure the following variables //
//////////////////////////////////////////////////////////////////////////////
//This is the text(link) that the script will look for below to see if the
//website checked has it exactly. Remember to put '' before double quotes,
//however the checker will not be looking for them.
$link_to_look_for = "http://www.cruisewarehouse.cc";


// These are the sites that will be checked to see if the previous link is present.
// Add as many links here as you want, using the form $url[] = "address";
$url[] = "http://cruisewarehouse.cc/links/links.php?&cat=1&offset=20";
$url[] = "http://www.website-2.com";
$url[] = "http://www.website-3.com";
//////////////////////////////////////////////////////////////////////////////
// DO NOT CHANGE ANYTHING BELOW THIS LINE //
//////////////////////////////////////////////////////////////////////////////
function removeComments ($pageText) {
if(strstr($pageText,'<!')) {
$start = strpos($pageText, '<!');
$comment = strstr($pageText, '<!');
$length = strpos($comment, '->') + 2;
$pageText = substr_replace($pageText, '', $start, $length);
// recursive function so that it continues removing comments untill there are none left.
$pageText = removeComments ($pageText);
return $pageText;
} else {
return $pageText;
}
}
function checkPage($url, $search) {
$file = file($url);
for ($i=0; $i<count($file); $i++) {
$pageText = $pageText . $file[$i];
}
fclose($file);
$pageText = htmlentities($pageText);
$pageText = removeComments($pageText);

if (eregi(htmlentities($search), $pageText)) {
return true;
} else {
return false;
}
}

for ($c=0; $c<count($url); $c++) {
if (checkPage($url[$c], $link_to_look_for) == "true") {
echo $url[$c] . " <font color="green">Link Found</font><br><br>nn";
}
else {
echo $url[$c] . " <font color="red">Link Not Found</font><br><br>nn";
}
}
?>

First and foremost What is you permissions in that directory it listed in the error?