Strange connection error

What would cause this




Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: Access denied for user 'nobody'@'localhost' (using password: NO) in /home/user/public_html/messageboard/sphpforum-0.5-rc1/edit_profile.php on line 11

Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in /home/user/public_html/messageboard/sphpforum-0.5-rc1/edit_profile.php on line 11

Warning: mysql_query() [function.mysql-query]: Access denied for user 'nobody'@'localhost' (using password: NO) in /home/user/public_html/messageboard/sphpforum-0.5-rc1/edit_profile.php on line 13

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home/user/public_html/messageboard/sphpforum-0.5-rc1/edit_profile.php on line 13

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/user/public_html/messageboard/sphpforum-0.5-rc1/edit_profile.php on line 13
This user does not exist.

Here are the files that are included:

<?php

require('config.php');

include('header.php');

PHP:

The connection itself is fine. only happens when a user clicks "edit profile" when logged in

edit_profile.php:

<?php
$dboff=!$_GET['id'];
require('config.php');

if (!$_SESSION['logged_in']) {
	die('You must be logged on to edit your profile');
}
include('header.php');

if(in_array($_SESSION['username'],$admin_users) && $_SESSION['id'] != $_GET['id']){
	$id=mysql_real_escape_string($_GET['id']);
	$sql="SELECT * FROM {$db_prefix}user WHERE id='$id'";
	$row=mysql_fetch_array(mysql_query($sql));
	if (!$row)
	  die("This user does not exist.");  
	$admin='<input type="hidden" name="id" value="'.$_row['username'].'">';
}else{
	$row=$_SESSION;
}
?>
<h2>Edit profile</h2>

<p>Logged on as: <?=$row['username'] ?></p>

<form method="post" action="update_profile.php">
<?= $admin ?>
<table>
<tr><td>Password:</td><td><input name="password" type="password" /><br />Leave blank to keep current password</td></tr>
<tr><td>E-mail:</td><td><input name="email" type="text" value="<?=$row['email'] ?>" /></td></tr>
<tr><td>Real Name:</td><td><input name="realname" type="text" value="<?=$row['realname'] ?>" /></td></tr>
</table>
<input type="submit" name="submit" value="Update profile" class="button"/> 
</form>

<? include('footer.php'); ?>

PHP:

 

Fixed

I was messing with something in the config file that i shouldnt have. its half fixed anyway. broken for me the admin and works for all other users