You don't have permission to access /debconf-es2/charlas/Amaya_sponsoring.mgp on this server. You don't have permission to access /debconf-es2/charlas/Charla_NM.pdf on this server. You don't have permission to access /debconf-es2/charlas/Charla_NM.odt on this server. Pues eso, que parece que hay algún problema de permisos. Saludos.