The requested URL could not be retrieved

While trying to retrieve the URL: http://www.alien.ru/~sibin/prj2.html

The following error was encountered:

Unable to determine IP address from host name for www.alien.ru
The dnsserver returned:

Server Failure: The name server was unable to process this query.
This means that:

The cache was not able to resolve the hostname presented in the URL.
Check if the address is correct.
Your cache administrator is root.

Generated Mon, 18 Feb 2008 11:17:13 GMT by yaj.ru (squid/2.5.STABLE10)