You need to go to Admin CP -> Settings -> Options -> General Settings
Turn Template Names in HTML comments to YES
Then go back to:
www.dimmicosacerchi.it/forum/forms.php
In your web browser, view the page source
At the top of the page will be a template name, maybe something like form_view
You then use the template name in the mod, something like
forms | form_view
Once its done and working go back and turn off template names in comments again.