I just ran a quick port scan on your domain and the ports are blocked/not responding. As these are configured to be open and listening on a default TKL install then I can only assume that something between you and the net is blocking them...

Where are you running this from?

If it is self hosted then perhaps you need to look at your port forwarding (assuming you are using a common NAT'd router) or you may need to talk with your ISP to get them unblocked. ..

If your site is 3rd party hosted then your hosting company would be a good start...