Critital error: Invalid $DOM_SCRIPT, edit it manually in config.php

<?

/* -----------------------------------------

  Chevereto - Script de hosting de imagenes
  Nightly Build 1.7 (29/10/2009)
  http://www.chevereto.com/

  Released under the GPL 2.0
  Copyright (C) 2008 by Rodolfo Berrios
  <inbox at rodolfoberrios dot com>

  ----------------------------------------- */

// Language //
define('LANG', 'en'); // en - English | es - Español | fa - Farsi | fr - Français | nl - Dutch | cn - ZH-CN (Chinese)

define('APP_NAME', 'GM-eSports Image Hosting'); // Your image hosting name
define('TAG_LINE', 'a Free Image Upload Solution, Simply browse, Select, and Upload!'); // Your tagline (for doctitles and logo)

// Folders //
/* If you change this, you also must change the folders name. */
define('DIR_UP','up/');
define('DIR_IM','images/'); // Change this to have something like /X/filename.jpg - where "X/" is the folder name. 
define('DIR_WORKING',DIR_UP.'working/');
define('DIR_TEMP',DIR_UP.'temp/');
define('DIR_TH','thumbs/');

// Min-Max values -> php.ini rules the nation... //
$max_mb = '2'; // Max. image size (Mbytes)
$max_by = $max_mb*1048576; // (bytes)
$max_name = '10'; // Max. file name lenght.

// Thumbs //
$mini_ancho = '150'; // Thumb width (pixels)
$mini_alto = '150'; // Thumb height (pixels)

// Resize //
$lowres = '16'; // Min. resize value (pixels)
$higres = '1280'; // Max. resize value (pixels)

// Options //
$lim_act = true; // true: Allows uploading just for your domain - false: Allows upload from anywhere (post from another website)
$debug_mode = false; // false: Debug OFF - true: Debug ON.
$cut_url = true; // true: Short URLs (TinyURL tr.im etc.) - false: normal url (http://mysite.com/images/image.jpg).
$cut_url_service = 'tinyurl'; // tinyurl
$cut_url_user = true; // If $cut_url = true -> true: Allows your users to cut their urls (preference) - false: Users can't choose to cut or not.
$allow_over_resize = false; // true: Allows over resize images - false: Don't allow over resize.


///////////////////////////////////////////////////////////////////
///// DO NOT EDIT BELOW THIS - (do it if the script can't run) ////
///////////////////////////////////////////////////////////////////

// SERVER ///
/* We get this values with $_SERVER. If your server doesn't resolve this values The script will not work.
   If the script doesn't work, you must change this values to be like values in the comments (see the exaple below) */

$DOM_SCRIPT = 'upload.gm-esports.com'; // --> mysite.com
$PATH_SERVER = '/home/esports/public_html/upload';

// FTP MODE //
/* Use this if you want to upload the files through ftp php (http://php.net/ftp). This is handly when your server config don't
   allow to upload files without CHMOD 777, like almost all the cPanel. Using this, you can forget the CHMOD ;) */
$use_ftp = false; // true: Uses ftp to upload files - false: Upload without ftp.
$ftp_host = $DOM_SCRIPT; // Change this if your ftp host is not the same as your mysite.com -- example: $ftp_host = 'ftp.mysite.com';
$ftp_user = ''; // valid username.
$ftp_pass = ''; // Valid password.
// NOTICE: FTP user must have access to the script folder.


///////////////////////////////
/// DO NOT TOUCH BELOW THIS ///
///////////////////////////////

// PATH //
/* Uhhh.. Can't touch this!. */
$path = dirname($_SERVER['PHP_SELF']);
if (strlen($path)>1) { 
    define('PATH_SCRIPT', $path.'/');
} else {
    define('PATH_SCRIPT', $path);
}

// URL //
/* Uhhh... Uhhh.. Can't touch this!. */
define('URL_SCRIPT', 'http://'.$DOM_SCRIPT.PATH_SCRIPT);

?>

Critital error: Invalid $DOM_SCRIPT, edit it manually in config.php