Maury Markowitz schrieb am 17.06.2012 um 08:22 (-0400):

> The error remains the same no matter what you try to open:
>
> Statement failed, SQLSTATE = HY000
> Can't access lock files' directory /tmp/firebird

http://tracker.firebirdsql.org/browse/CORE-3185

Possibly permissions.

Check the message by Popa Adrian Marius (mapopa) here:

https://bugs.launchpad.net/ubuntu/+source/firebird2.5/+bug/678318

Michael