I struggled also... buit the trick is to download the OLD version. It worked for me within 10 minutes , the new one never...the new version is totally different.
Second thing is that the link in the PC tutorial is wrong and I keep meaning to update it...I'm opening a new browser window and...fixed!
Ok, what is it actually doing when you open klient? It should automatically connect to one of the chattersonline servers. Did you set the port to 6669? Did you increase the timeout?