Chat.php in different directory

[Poggyuk]

Hi, can somebody help me please...
I want to create a chat.php file & have it in a different directory to my forums, but when i use the usual way of calling up templates
e.g:
<?php
error_reporting(7);
require('./global.php');
eval("dooutput(\"".gettemplate('chat')."\");");
?>
I always get an error

How would i go about putting chat.php in a different directory to my forums?

(If that makes sense?!)

Thanks in advance!