[Zope] Virtual host

I'm sure: this is not a FAQ. Let's say I have two domains to serve on my server: www.pippo.it and www.pluto.it. www.pippo.it is a virtual host served by Apache on /var/www/pippo.it while www.pluto.it is a virtual host I want to serve by Zope ZServer. Using ProxyPass directive I managed to serve www.pluto.it/Zope on port 8080 but I wasn't able to serve directlty www.pluto.it. Any hints? Thanks. Marco Beri.