Help with global.php guys

[Blam Forumz]

Hello everyone, I have this at the top of my global.php

	$YOUR_DOMAIN     = "forum.downwithipod.com"; // EDIT TO YOUR SETTING!
	$FORUM_DIRECTORY = "forum"; // EDIT TO YOUR SETTING!

	if($_SERVER['SERVER_NAME'] != $YOUR_DOMAIN){
	header("Location: http://{$YOUR_DOMAIN}".str_replace("{$FORUM_DIRECTORY}/","",$_SERVER['REQUEST_URI']));
	}

it is to force a subdomain redirect, now I use vBa CMPS, which calls the global.php file at the begining of it, so since its calling the global.php, its redirecting my homepage to the forums

Anyhelp?

thank