Hi again, chuck

>I use a firebird.conf which points to my data in the <<App>>/Data directory.
>
>

It's a shot in the dark, but "App" could have an hard coded dir in it?
Something that expects to be on drive D: but on this system your cdrom
drive is E: or other? I know that this is really a simple mistake, but
sometimes are just this simple things the hardest to debug.

>It still seems to be a database recognition thing, but I don't have a clue
>what's wrong. Any further suggestions?
>
>

Post your connection string;
Post what changes you did in firebird.conf.
Try to put some debug info inside your application, that can show you
where it will fail.
We have the feeling that it's at connection time, but just make sure.

Artur