> is it possible to run FB 1.0 and FB 1.5 on the same machine at the
> same time both using Port 3050?
> Would it cause problems running 2 applications (one on FB 1.0 and one
> on FB 1.5) on Port 3050.

If your server has several IP adresses you can try to bind both
instances to different addresses.

> Or is it neccessary to configure different ports for each server?

This is the usual and preferrable solution.

Elmar