Check all your IPs in both client and server, and check server names. I see Diamond and ktest...
Diamond and Ktest wont matter my server is still like that now.
Do
Start > Run > Type CMD > IPConfig/All
Find out your IP address (Router) it should be 192.168.??????
Change all your IPs in your server files to that IP, then in your client files you change the the IP aswell to this, this way you will be able to connect.
Or you can just try connecting through 127.0.0.1 (Client) if your connecting on the same PC.