okay to me it looks like that you have just copied flashchat.php from chat folder to main forums folder...
Copy whole chat folder as it is in the forums folder so your flashchat.php will be in forums/chat/flashchat.php
and then you can edit the path of forum config file in vbulletin35CMS.php as
PHP Code:
require_once '/home/ausnrl/public_html/forums/includes/config.php';
Regards,
Deep