this winsock error is a timeout problem, no response from server
there is no one complaining about server unavailable and I can say that serv5 is working (you are not mentioning your server)
if you have the servername and port correctly configured and its still not working try to check if you can ping the server. If not you might be temporarily banned but in this case you should find a mail from cs-server telling you the reason for the ban. Perhaps check your spam mails, if you cannot find a mail in your inbox.
If you are not banned the problem might be caused by a firewall or some security applications. Programs like Norton Internet Security and ZoneAlarm might block internet access from unknown applications or none default ports