At 12:34 AM 13/03/2009, you wrote:

>I am having the same problem with Vista Business. After installing Firebird 2.05, attempt to connect to database failed. I reinstalled back 2.04 and everything works again.

Look at the DPB parameters. In 2.0.5 there are several that cannot be set by ordinary users. Documented in the release notes.

./hb