When i hit the connect button Kad attempts to connect without success
So you can connect through KAD?
No, he can't.
It could be that your client is configured to update its server list. Probably that update failed and the servers got removed. You could download a safe server list from somewhere. Try to bootstrap KAD as pure suggested too.
A trustworthy server is provided by tvunderground. Look at the blue box on the left on this site: http://tvu.org.ru/