Problem trying to connect between two computers using MooClick

I tried setting up a basic connection application to get a feel for how it works. I used the attached Events/Objects, built the application, then used an SD card to copy the application to another computer for a test. When I put in the first computer's IP address on the second computer and clicked "Join", nothing happened. Is there something I'm missing or doing wrong? Thanks.
(This is my first post, so if it doesn't make sense please tell me.)