Why can't I change server_name in Nginx?

Question

Nginx

Hello.
I need to make it so that on my local computer, when I type in the koblikov.org browser, Nginx gives a static page.
I have Nginx 1.4.6 installed on Ubuntu 14.04.
/etc/nginx/sites-available has default and koblikov.org. default text:

server {
  location / {
    root /home/kmv/WebProjects/УИТС;
  }
}

server {
  root /usr/share/nginx/html;
  index index.php index.html index.htm;

  # Make site accessible from http://localhost/
  server_name localhost;

  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;
    include fastcgi_params;
  }
}

Text koblikov.org:

server
{
    server_name koblikov.org;
  
    root /home/kmv/WebProjects/УИТС/Лаб1;
  
    index index.php index.html index.htm;
  
    # use fastcgi for all php files
    location ~ \.php$
    {
        fastcgi_pass 127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }
}

I restarted nginx and tried " koblikov.org " and "koblikov.org", while localhost normally gives sites.
How to make koblikov.org accessible?