Need a little help with a firewall config.

I've got a Snapgear SOHO+ Router here at work, I'm trying to run a CS server off works net connection (I have permission to do this before you ask :) ). Now it's uses port 27015, the internal IP of the server is 192.168.0.3. I cant seem to get the router to forward port 27015 properly using the GUI. So i was wondering if someone could help me out with the "code" i need to add to the firewall to forward that port correctly.

Thanks
FaTs

Edit: Pic of Router GUI

http://www.clanwartorn.com/FaTs/img/routergui.JPG