Node content doesnt appear + The requested page could not be found.

When I use chrome the node content of main page doesnt appear: http://www.artedepassaremconcursos.com.br When I put a direct link like: http://www.artedepassaremconcursos.com.br/quem-sou-eu or http://www.artedepassaremconcursos.com.br/tutoria I receive the msg: “The requested page “/quem-sou-eu” could not be found.” When I use the firefox, all works fine. I use[…]