Hi jbahillo,
thank you very much for your sugestion, I tried and, after some troubles (I had to uninstall/reinstall some packages), I got it.
I have a web deployed on /var/www/myweb, what is the right way to put it to work again? I created a virtual host from the admin with the name "myweb", but it only shows the main page. When I try to access (via user/password) to the php application installed, it won't find the pages.
Thank you!