i activated zenpage from the plugins.
But i don't see the articles in the main page; i would have in the home zenpage + zenphoto. is it possible?

What you want to do is goto the options for zenpage now and activate the combinews option and adjust your settings to your liking.

You have also to use a theme with Zenpage support. Currently that is the Zenpage-default theme (in the svn renamed to just "Zenpage" now) and the Efferescence+ theme and two third party themes.