Privileges problem with add_submenu_page [closed]

admin.php?page=quiniela/characters.php is coming from where in your codes well try this.

function add_quiniela_menu()
{
    add_menu_page('Quiniela Game', 'Quiniela Game', 0, 'quiniela/quiniela_funcs.php', '', '');
    add_submenu_page( 'quiniela/quiniela_funcs.php',
        'Characters', 
        'Characters', 
        0, 
        'quiniela/quiniela_funcs.php?page=characters'
    );

}