JAY LICHTENAUER If you're registration will not stick, then Passenger is unable to write the preferences file. As of version 3.0, the preferences are stored in the Passenger application folder for better portability of registration and settings as you move from server to server. I also cover this in my tips and troubleshooting and the latest verison 3.3 gives an alert when preferences cannot be written and what to do about it. You'll also find that if you write me directly, I give the answer very quickly by email as well.
(Version 3.3)