Nginx more fastcgi-mono-server

I've been looking for post related to my problem, but I have not found. I´m hopeless, I follow the guide for install and config nginx with fastcgi-mono-server ( http://www.mono-project.com/FastCGI_Nginx ), I do all how say in the guide but I can´t do that the nginx can interpret asp page.

My config pages in /etc/nginx/sites-available/default:

server{
    listen   80;
    server_name  prueba;
    access_log   /var/log/nginx/prueba.access.log;

    location / {
        root /var/www/prueba/;
        index index.html index.htm default.aspx Default.aspx;
        fastcgi_index Default.aspx;
        fastcgi_pass 127.0.0.1:9000;
        include /etc/nginx/fastcgi_params;
    }
}

The config of /etc/nginx/fastcgi_params:

fastcgi_param   QUERY_STRING            $query_string;
fastcgi_param   REQUEST_METHOD          $request_method;
fastcgi_param   CONTENT_TYPE            $content_type;
fastcgi_param   CONTENT_LENGTH          $content_length;

fastcgi_param   SCRIPT_FILENAME         $request_filename;
fastcgi_param   SCRIPT_NAME             $fastcgi_script_name;
fastcgi_param   REQUEST_URI             $request_uri;
fastcgi_param   DOCUMENT_URI            $document_uri;
fastcgi_param   DOCUMENT_ROOT           $document_root;
fastcgi_param   SERVER_PROTOCOL         $server_protocol;

fastcgi_param   GATEWAY_INTERFACE       CGI/1.1;
fastcgi_param   SERVER_SOFTWARE         nginx/$nginx_version;

fastcgi_param   REMOTE_ADDR             $remote_addr;
fastcgi_param   REMOTE_PORT             $remote_port;
fastcgi_param   SERVER_ADDR             $server_addr;
fastcgi_param   SERVER_PORT             $server_port;
fastcgi_param   SERVER_NAME             $server_name;

fastcgi_param   HTTPS                   $https;

fastcgi_param  PATH_INFO          "";
fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;

fastcgi_param   REDIRECT_STATUS         200;

I have crate a Default.aspx page in /var/www/prueba/

Now I run:

fastcgi-mono-server2 /applications=prueba:/:/var/www/prueba/ /socket=tcp:127.0.0.1:9000

After, I start nginx:

/etc/init.d/nginx start

And when I try to access to "http://localhost/" or "http://localhost:80/" show me:

No Application Found

Unable to find a matching application for rquest:

    Host localhost
    Port 80
    Request Path /Default.aspx
    Physical Path /var/www/prueba/Default.aspx

I hope you can help me.