Почему не работает error_page в nginx?

server {
        server_name "mysite.ru";
        root "/var/www/mysite/";

        ###
        location / {
                try_files $uri $uri/ =404;
        }

        location ~ \.php$ {
                try_files $uri =404;
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;
       }



        #Errors
        error_page 400 /errors/index.php?400;
        error_page 403 /errors/index.php?403;
        error_page 404 /errors/index.php?404;
        error_page 500 /errors/index.php?500;

        location = /errors/ {
                root "/var/www/common";
                internal;
        }

}