mysql_fetch_array(): not a valid result?

[Jam-ez]

Error:

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in H:\wamp\www\randomn\index.php on line 32

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in H:\wamp\www\randomn\index.php on line 33

index.php

<?php

session_start();
include("config.php");

if ($_GET['login'])
{
switch ($_GET['login'])
{
case '1':

echo("Welcome to something not worth the warm welcome.

<form action='?login=2' method='post'>
<strong>Username</strong>: <input type='text' name='username' size='20' />
<br /><br />
<strong>Password</strong>: <input type='text' name='password' size='20' />");

break;

case '2':

$username = $_POST['username'];
$password = $_POST['password'];
$password = md5($password);

if ($username == "" || $password == "")
{
die("You did not enter a username and/or password.");
}

list($user) = mysql_fetch_array(mysql_query("SELECT `username` FROM `staff` WHERE username='$username'"));
list($pass) = mysql_fetch_array(mysql_query("SELECT `password` FROM `staff` WHERE password='$password'"));

if ($username == "$user" && $password == "$pass")
{
$sql = mysql_query("SELECT * FROM `staff` WHERE username='$user' AND password='$pass'");

if (mysql_num_rows($sql) != 1)
{
die("Error...");
}

$result = mysql_fetch_array($sql);

$_SESSION['user'] = $result['username'];
$_SESSION['level'] = $result['level'];
$_SESSION['ip'] = $_SERVER['REMOT_ADDR'];

header("location: home.php");

}

break;
}
}
else if (!$_GET['login'])
{
header("location: ?login=1");
}
else
{
die("Error.");
}

?>

config.php (table is commented out because I've already added it)

<?php

$host = "localhost";
$user = "root";
$pass = "";
$data = "hab";

$connect = mysql_connect($host, $user, $pass);

if (!$connect)
{
echo("Error connecting to database.");
}

mysql_select_db($data);

/*
mysql_query("CREATE TABLE `users` (
`id` int(255) NOT NULL auto_increment,
`username` varchar(500) collate latin1_general_ci NOT NULL,
`password` varchar(500) collate latin1_general_ci NOT NULL,
`level` varchar(500) collate latin1_general_ci NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=44 ;
") or exit("Couldn't create users table.");

echo("Users table created."); */

?>

Any ideas why its giving me this error? I'm testing on localhost, wampserver.

[Jam-ez]

Fixed, was an error in the mysql table.

[Doritos]

Next time if you want to figure out what happened, use mysql_error();

mysql_query("blabla") or die(mysql_error());