Real VNC

[TMFS9]

I have installed Real VNC on my home computer to be able to remotely connect from my work computer. I have installed the program on both computers, I followed the directions given by the website but they aren't completely clear and they don't offer support because it's a free program. If I have the server program running on my home computer, and then try to connect through the viewer on the same computer I am allowed to connect through the server. But when I try from work I get a message saying can't connect to the host. Is there anything I need to do besides just the basic installation, like setup ports or open ports, or anything else?