How do EZ-Pages work?

[kuroi]

I uploaded all "template default files"into "new template folder" (override them),

Why?

then re-uploaded only the files of the new template. Now in public section I could see the ezpages but only the body, not the titles in menu (both in header, in sidebox and footer).
How to fix it?

What files did you "reupload" to the new template? In particular, is there an includes/templates/silverfish/templates/tpl_page_default.php file?

Does your content show up if you switch back to the classic template?