Here are the instructions I followed.
Two things I had problems with:
- Reverse DNS (make sure your hostname and IP address resolves to each other correctly)
Here is how to check if your DNS resolves backward and forward correctly
>> dig +short hostname
>> dig +short -x your_ip_address
- Make sure the hostname you put in the server configuration matches the "Screen name" in your client.
Then you are good to go! :-)