[Login php with session not redirecting to index.php]

I am using PHP 5.3  iis7 and SLQ Server 2005. I know the script gets to the session part and creates a temp file in C:/windows/temp folder (see info below), but when I try to login and redirect to the index.php  it give a 500 error on the login.php page.

 

login.php

index.php

conifg.php

temp file - C:\windows\temp

<?php
//set ini
ini_set('session.gc_maxlifetime', 900);
if(!ini_get('session.auto_start')){
	session_start();
}
// include file
include ('config.php');
include (LIB_PATH.'functions.php');
include(LIB_PATH.'sqlsrv_connect.php');
if($_SESSION['user_id']){
		
			Header("Location: index.php"); 
}



if($_POST['submit']){
	$user1 = trim($_POST['user']);
	$pass1 = trim($_POST['pass']);
$user= "'$user1'";
$pass= "'$pass1'";


	if($user == '' or $pass == ''){
		$error = 'You forgot to enter your user_name and your password!';
	}else{
		$query = "SELECT * FROM users WHERE user_name = $user and pass = $pass";
		$params = array();
		$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
		$r = sqlsrv_query ($database, $query, $params, $options);

		



$num = sqlsrv_num_rows($r);
		
		if ($num >0) {
		
while ($user_data = sqlsrv_fetch_array($r, SQLSRV_FETCH_ASSOC)) {
		
		
						
		$_SESSION['user_id'] 	= $user_data['user_id'];
		$_SESSION['user_name'] = $user_data['user_name'];
		$_SESSION['user_level'] = $user_data['user_level'];
		$_SESSION['user_rep'] 	= $user_data['rep'];}
 
			Header("Location: index.php"); 

		}else{
			$error = 'Wrong username or password!';

			
		}
	}
}




//template
include(TEMP_PATH.'login_tpl.php');


?>

<?php
//set ini
ini_set('session.gc_maxlifetime', 900);
if(!ini_get('session.auto_start')){
	session_start();
}
// include file
include ('config.php');

//include (LIB_PATH.'functions.php');

include(LIB_PATH.'sqlsrv_connect.php');

if(!$_SESSION['user_id']){
	Header("Location: login.php");
}

$database		

//template
include(TEMP_PATH.'index_tpl.php');
?>

<?php

date_default_timezone_set('America/Los_Angeles');

//config directory
define( 'DS', DIRECTORY_SEPARATOR );
define( 'DS', D );
define('SITE_PATH', dirname(__FILE__) . DS);
define('LIB_PATH', SITE_PATH . 'lib' . DS);
define('TEMP_PATH', SITE_PATH . 'templates' . DS);

define('SO_PER_PAGE',20);

?>

user_id|s:1:"6";user_name|s:2:"EM";user_level|s:1:"1";user_rep|s:0:"";