vBulletin login on WordPress

[ResaleBroker]

I want to include a vBulletin "login" on a WordPress page. [Example Page]

If I add the vBulletin code to the WordPress code I receive the following message: "Unable to add cookies, header already sent."

Here is the code in question:

PHP Code:

 PHP Code:
<?php get_header(); ?> 
 
<?php 
chdir("/home/sales/public_html/forums/"); 
require('/home/sales/public_html/forums/global.php');
chdir("./");
?>

Does anyone have any ideas on how to get this to work?