Sorry, this search mechanism is now disabled - it is not very good and too resource intensive.
Please use the far superior forum search on the AusGamers site - it seriously kicks ass and will actually work!
You can access it here:
http://www.ausgamers.com/forums/search.php. Go!
Alternatively, you can search using Google by entering in your search terms, and then appending the text: 'site:qgl.ausforums.com' (without the quotes). This will limit the search to URLs that are from that site. It's a super handy trick you can use to search any site!