Understanding Multiple Socket Poller

[Kevin Meredith]

Given the following set-up that I took from the online guide:

1. Multiple Socket Poller 
   
2. Weather Update Server
   
3. Task Ventillator
   

I started the weather server (#2), and then the Task Ventillator. Finally, I started #1, the multiple socket poller. Lastly, I pressed enter on the Task Ventillator to begin publish-ing data.

However, I do not see any traffic getting processed within the Multiple Socket Poller:

Why is that?