add new page problem

Hey everybody, i’m working on a web-site, when i add a new web page it appears on the menu, but when clicked on, the new page can’t found
i have the same problem as this guy: ‘https://wordpress.org/support/topic/using-wamp-new-pages-get-404-requested-url-not-found-on-this-server?replies=18’
but the difference i’m not working in WAMP server, when i was everything was fine