WP Password Cookie Protection

what i want to do is have a permanent “password” field in my sidebar nav in my theme that will allow users to enter a password to view a password protected page.

to do this I have created a page and set it to password protected in the wordpress admin and created a password.

then ive edited my themes sidebar to include

<form action="http://mysite.com/wp-mine-pass.php" method="post">
<input name="post_password" id="pwbox-105" type="password" size="20" />
<input class="submit_button" type="submit" name="Login" value="Login" />
</form>

now because the standard redirect in the wp-pass.php file is the wp_get_referer and the refer in this case could be any page (as the password box is part of the sidebar) i have duplicated this and hardcoded the redirect to the page i want as follows in the file “wp-mine-pass.php”

<?php
/**
 * Creates the password cookie and redirects back to where the
 * visitor was before.
 *
 * @package WordPress
 */

/** Make sure that the WordPress bootstrap has run before continuing. */
require( dirname(__FILE__) . '/wp-load.php');

if ( get_magic_quotes_gpc() )
	$_POST['post_password'] = stripslashes($_POST['post_password']);

// 10 days
setcookie('wp-postpass_' . COOKIEHASH, $_POST['post_password'], time() + 864000, COOKIEPATH);

wp_safe_redirect('specialists');
?>

however rather than showing the specialists page unprotected it just shows the standard password protected page and login box in the centre of the content which means i have to re-enter the password again to view the content

anyone any ideas?

However what happends is that when the password