Roman, thanks for all, but now all is ok:
I tried on another PC and all works fine.
I think it's only a configuration problem.

Thanks
reebo

--- In Firebird-Java@y..., "rrokytskyy" <rrokytskyy@y...> wrote:
> > the statement is "Select * from tblUtenti" a very simple Select,
> > and I try also with the field name instead of "*" but it's the
> > same!
>
> Sorry, no idea. In previous case I tried statements that were
causing
> problems on my computer and everything was fine.
>
> > At the moment I don't have isql and I can't try do this.
>
> You should have. It is shipped with Firebird installation and is
> located in bin/ directory.
>
> Best regards,
> Roman Rokytskyy