Well, did you make sure you have a DNS entry for that URL in the hosting companies or whereever you bought the domain, DNS server?
There is Domain information for that domain but it is not associated with any IP address so nothing can find the server. Did you give an IP address for the server in the server config?
For our website...
http://www.aatraders.com resolves to 209.83.210.203
For your url...
black.hole.pp.ru resolves to black.hole.pp.ru
That is wrong as it should resolve to an IP address. Until that is fixed you will not have anyone accessing your game. It is not a game issue but a server issue.