Showing the admin panel when login.

Hi, i am having a problem with trying to show the admin panel when i login. This is the code so far:

<?php

if(@$_SESSION['Loggedin'] == 'true')
{require'logged_in_options.php';}
else
{@$_SESSION['Loggedin'] = 'false';

?>

--The Login Box Is Here--

<?php } ?>

<?php

if ($_SESSION['Loggedin'] == 'usernamehere'){
$_SESSION['admin'] = 'true';}
else{$_SESSION['admin'] = 'false';}
if ($_SESSION['admin'] == 'true'){
require 'admin_panel.php';}

?>

The problem is, is that it still shows the admin panel for all users, can anyone spot the problem, please let me no. Thanks for your replies.

Well for one your not calling session_start(); therefore the script has no reference to your $_SESSION variables.

Well for one your not calling session_start(); therefore the script has no reference to your $_SESSION variables.Yes but the page acctually does have session_start();