Resim eklerken çıkan sorun,, Yardım lütfen

<?php
	include ($_SERVER['DOCUMENT_ROOT']."/system/generalconf.php");
	$_GET['ImagePath']=$_SERVER['DOCUMENT_ROOT']."/admin/listings/pics/".$_GET['ImagePath'];
	$Ext = strtolower(end(explode('.',$_GET['ImagePath'])));
	switch ($Ext)
	{
		case 'jpg':
		$Image = @imagecreatefromjpeg($_GET['ImagePath']);
		break;
		case 'jpeg':
		$Image = @imagecreatefromjpeg($_GET['ImagePath']);
		break;
		case 'gif':
		$Image = @imagecreatefromgif($_GET['ImagePath']);
		break;
		case 'png':
		$Image = @imagecreatefrompng($_GET['ImagePath']);
		break;
	}
	$Width =  imagesx($Image);
    $Height = imagesy($Image);
	$Scale=min( $LISTING_VIEW_WIDTH/$Width,$LISTING_VIEW_HEIGHT/$Height);
	if ($Scale  < 1)  
	{
    	$NewWidth = $LISTING_VIEW_WIDTH;
    	$NewHeight = $LISTING_VIEW_HEIGHT;
    	$TmpImage =  imagecreatetruecolor($NewWidth, $NewHeight);
    	imagecopyresampled($TmpImage, $Image, 0, 0, 0, 0,
                         $NewWidth, $NewHeight, $Width, $Height);
    	imagedestroy($Image);
    	$Image = $TmpImage;
	}
	header("Content-type: image/jpeg");
	imagejpeg($Image);
?>