Sometimes I cannot access some sites.
Opera Browser Says- "You tried to access the address [url]http://..../[/url], which is currently unavailable. Please make sure that the Web address (URL) is correctly spelled and punctuated, then try reloading the page."
Internet Explorer 6 says - "Internet Explorer was unable to link to the Web page you requested. The page might be temporarily unavailable."
But the same time I can access other sites.
Then If I reconnect to the internet, My IP has changed, then I can access that site.
What is the solution?