I had the same problem and found this site to be so helpful with many different fixes: http://www.jamestadeo.com/dolphin
Specifically the How to Set Up the Orca Forum is at http://www.jamestadeo.com/dolphin/boonex-dolphin-tutorial-how-set-up-orca-forum.php and I was able to get mine up and running.
Specifically the How to Set Up the Orca Forum is at http://www.jamestadeo.com/dolphin/boonex-dolphin-tutorial-how-set-up-orca-forum.php and I was able to get mine up and running.