php header() funkar i wamp men inte på webserver

<?php @include("../login/validate_user.php"); ?>

<?php
	$user_id = $_SESSION['user_id']; 

	if (isset ($_GET['submit'])) {
	
		include ('../login/mysql.php');
		
		$name = mysql_real_escape_string ( $_GET['name'] );
		$description = mysql_real_escape_string ( $_GET['description'] );
		$user_id = $_SESSION['user_id']; 
		
		if ( !empty ($name) && !empty ($description) ) {
		
			$query =" INSERT INTO projects (project_id,project_name,description,entrys,user_id)
											VALUES ('0','".$name."','".$description."','0','".$user_id."') " or die(mysql_error());
			
			 mysql_query ( $query );
			 
			 header("location: projects.php");
		}
	}

?>

<?php

session_start();

// If the submit button is pushed
if (isset ($_POST['submit']))  {

	include ('mysql.php');
	
	$email = mysql_real_escape_string ( $_POST ['email']) ;
	$password = mysql_real_escape_string ( sha1($_POST ['password'])) ;
	
	// Check if the email and password is entered
	if (!empty ($email) && !empty ($password)) {
	
		// Check if there is an email and pwd maching in the database
		$sql = mysql_query ("SELECT * FROM users
		WHERE Email='".$email."'
		AND Password='".$password."'
		LIMIT 1");
				
			// If there is a maching pwd and email, then check if its activated
		if (mysql_num_rows ($sql) > 0) { 
			$query  = "SELECT Activated FROM users 
			WHERE Email='".$email."' 
			AND Password='".$password."' ";
				
			$result = mysql_query($query);
					
			while($row = mysql_fetch_row($result)) {
				$sql_activatied = $row[0];
			} 
				
			// If it is activated it makes a session 
			if ( $sql_activatied == 1 ) { 
				
				// get the firstname from the database
				$firstname  = "SELECT firstname FROM users WHERE Email='".$email."' AND Password='".$password."'" ; 
				$result = mysql_query($firstname);
				while($row = mysql_fetch_row($result))  { $firstname = $row[0] ; } 
					
				// get the lastnamefrom the database
				$lastname  = "SELECT lastname FROM users WHERE Email='".$email."' AND Password='".$password."'" ; 
				$result = mysql_query($lastname);
				while($row = mysql_fetch_row($result))  { $lastname = $row[0] ; }

				// get the id from the database
				$user_id  = "SELECT user_id FROM users WHERE Email='".$email."' AND Password='".$password."'" ; 
				$result = mysql_query($user_id);
				while($row = mysql_fetch_row($result))  { $user_id = $row[0] ; } 
				
				$_SESSION['loggedin'] = true;
				$_SESSION['email'] = $email; 
				$_SESSION['password'] = $password; 
				$_SESSION['firstname'] = $firstname; 
				$_SESSION['lastname'] = $lastname; 
				$_SESSION['user_id'] = $user_id; 
					
				// get the user_type from the database
				$query  = "SELECT User_type FROM users WHERE Email='".$email."' AND Password='".$password."'" ; 
	
				$result = mysql_query($query);
				while($row = mysql_fetch_row($result))  { $user_type = $row[0] ; } 
					
				if ( $user_type == 'c' ) { 
						$_SESSION['user_type'] = 'c'; 
						header('location: http://XXX.se/logbook/admin.php/');
				} 	else { 
						header('location: http://XXX.se/logbook/projects/projects.php');
					}
		
			}	else {
					print 'You have not activated your account!';
				}
		} 	else {
				echo 'Wrong email or password';
			}
	}	else {
			print 'You must enter a email';
		}
}
?>