Getting this script to work

[Vizionz]

Figured it out Part 2 coming soon

Okay I am trying to bring this script into my forum but this is where i am having a problem. i want to use the theme. but If i call the forum

<?
chdir('/httpdocs/Forum'); 
require_once('./global.php');
?>
<center><body bgcolor="alt2">
</head><body><? echo $style['css']; ?>

session_start(); <---In the script itself Is gonna give me a problem..
If i remove session_start it works But then the script wont work