Hi, I am not sure if this will help... I found that the Dolphin database would not work unless I used MySQL version 5. I also discovered that my server was using suPHP (PHPsu.exec). This caused a sever 500 error. I had to remove the default Dolphin PHP instruction (php_flag register_globals Off) from .htaccess (root). I then put this into the php.ini file (root).

I hope this helps!