Image doesn't show

Hello,
For some unknown reason my image protecting script doesn't work...
Wan i calling image from html who is in same directory witch script its just displays nothing (no redirection, no image, nothing!).
Any ideas whats wrong?
Thanks.

<?php
// This script can watermark image, hide real image patch, and prevent hotlinking to images.
// originally what script is named img.php. you can rename it.
// call this script with an image tag
// <img src="script.php?imageurl"> where imageurl is a relative path such as subdirectory/image.jpg

//____________WEBSITES ALLOWED TO LINK TO IMAGES____________________
// Do not put any trailing slashes ("/") nor any "http://" prefixes.
// If your webpage can be viewed witch www. and witeout, put both urls.
$validprefixes = array (
"something.com",
"www.something.com"
) ;

//____________REDIRECTION___________________________________________
// If visitor will try to access what file, where he will be redirected?
$homepage = "www.something.com" ;

//____________IMAGE PATH____________________________________________
//image path used to hide real image url.
// Here how it works: script will add imgpath to text you entered in image url.
// For example: if your tag is <img src="scriptame.php?imageurl.png">
// and imagepath is img/ , the real image path will be img/imageurl.png .
// In image path you can also enter webpage.
$imgpath = "image/";

//____________WATERMARK____________________________________________
//image what will be used as watermark.
//watermark must be larger wan images who will be watermarked.
$watermarkPath = "watermark.gif" ;
//Enter watermark displaying strength from 100 till 0.
//Note: if it will be 0 no watermark will be added.
$watermarkstrength = "25";

//____________END OF CONFIGURATION__________________________________

	function isreferrerokay ( $referrer, $validprefixes )
	{
		$validreferrer = 0 ;
		$authreferrer  = current( $validprefixes );
		while ($authreferrer) {
			if (eregi( "^https?://$authreferrer/", $referrer )) {
			$validreferrer = 1 ;
			break ;
			}
			$authreferrer = next( $validprefixes );
		}
		return $validreferrer ;
	}
	$img = $_SERVER['QUERY_STRING'] ;
	$imgurl = $imgpath . $img ;
	$referrer = getenv( "HTTP_REFERER" );
if (isset($_SERVER['QUERY_STRING'])) {
	if (empty($referrer) || isreferrerokay( $referrer, $validprefixes )) {
		$filetype = substr($imgurl,strlen($imgurl)-4,4);
		$filetype = strtolower($filetype) ;
		$watermarkType = substr($watermarkPath,strlen($watermarkPath)-4,4);
		$watermarkType = strtolower($watermarkType);
	    
		if($filetype == ".gif")
			$image = @imagecreatefromgif($imgurl);
		else
			if($filetype == ".jpg" || $filetype == "jpeg")
				$image = @imagecreatefromjpeg($imgurl) ;
			else
				if($filetype == ".png")
					$image = @imagecreatefrompng($imgurl) ;
				else
					die();  
	    
 		if(!$image)
 	       die();
 	   
 	   if($watermarkType == ".gif")
 	       $watermark = @imagecreatefromgif($watermarkPath);
 	   else
 	       if($watermarkType == ".png")
 	           $watermark = @imagecreatefrompng($watermarkPath);
 	       else
 	           die();
 	       
 	   if(!$watermark)
   	     die();
	
		$imagewidth = imagesx($image);
		$imageheight = imagesy($image);  
		$watermarkwidth =  imagesx($watermark);
		$watermarkheight =  imagesy($watermark);
		$startwidth = ($imagewidth - $imagewidth);
   		$startheight = ($imageheight - $imageheight);
		imagecopymerge($image, $watermark,  $startwidth, $startheight, 0, 0, $watermarkwidth, $watermarkheight, $watermarkstrength);
		imagejpeg($image);
		imagedestroy($image);
		imagedestroy($watermark);
	} else {
		//if (isset($email)) {
		//mail( $email, "Bandwidth Theft Alert",
		//"WARNING:\n\n$referrer\ntried to access\n$image\n",
		//"From: IMGProtection <$email>" );
		//}
		header( "HTTP/1.0 404 Not Found" );
	}
} else {
	header( "Location: $homepage" );
}
?>

PHP:

 

Made it work, stupid cache....
Feel free to use script it works fine for me