Traffic 360 Add-on..How does it work?

I recently bought the Traffic 360 add-on and need help on how this works. It seems that when I land at an airport there are no gate parking places for the Jetway and there is no traffic in the air or moving on the ground?? I advanced my sliders to increase traffic and didn't notice a big difference. Can anyone guide me to get this working? Again the manual is vague and not simple to understand. Thanks!