go to...

http://gamenationx.net

and it says:

Fatal error: Call to undefined function: message_die() in /home/llamaman/public_html/gnx/db/db.php on line 88

I dont know whats happening.... .

I used this coding for db.php:

<?php
/************************************************************************
db.php
-------------------
begin : Saturday, Feb 13, 2001
copyright : (C) 2001 The phpBB Group
email : support@phpbb.com

$Id: db.php,v 1.10 2002/03/18 13:35:22 psotfx Exp $


*************************************************************************/

/************************************************************************
This file is part of the phpBB2 port to Nuke 6.0 (c) copyright 2002
by Tom Nitzschner (tom@toms-home.com)
http://bbtonuke.sourceforge.net (or http://www.toms-home.com)

As always, make a backup before messing with anything. All code
release by me is considered sample code only. It may be fully
functual, but you use it at your own risk, if you break it,
you get to fix it too. No waranty is given or implied.

Please post all questions/request about this port on http://bbtonuke.sourceforge.net first,
then on my site. All original header code and copyright messages will be maintained
to give credit where credit is due. If you modify this, the only requirement is
that you also maintain all original copyright messages. All my work is released
under the GNU GENERAL PUBLIC LICENSE. Please see the README for more information.

*************************************************************************/

/************************************************************************

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

************************************************************************/

global $forum_admin;
if ($forum_admin == 1) {
$the_include = "../../../db";
} elseif ($inside_mod == 1) {
$the_include = "../../db";
} else {
$the_include = "db";
}

switch($dbtype) {

case 'MySQL':
	include("".$the_include."/mysql.php");
	break;

case 'mysql4':
	include("".$the_include."/mysql4.php");
	break;

case 'postgres':
	include("".$the_include."/postgres7.php");
	break;

case 'mssql':
	include("".$the_include."/mssql.php");
	break;

case 'oracle':
	include("".$the_include."/oracle.php");
	break;

case 'msaccess':
	include("".$the_include."/msaccess.php");
	break;

case 'mssql-odbc':
	include("".$the_include."/mssql-odbc.php");
	break;

case 'db2':
	include("".$the_include."/db2.php");
	break;

}

$db = new sql_db($dbhost, $dbuname, $dbpass, $dbname, false);
if(!$db->db_connect_id) {
message_die(CRITICAL_ERROR, "Could not connect to the database");
}

?>

Seems as though you may have deleted a file or a function within some file. (message_die) being that function.

Just check you have all the files, and that you can actually find the message_die function.