Crowd Simulation problem

[Diurno]

Hi all, i'm starting to work with the Crowd Simulation system, but i'm experience some problem.
I load my actor (the defaul pedestrian), with 2 action source (sitting and sittinghandclap), then i create my surface as emitter and add it in the crowd system.
Then, when i choose Simulation -> Stadium Crowd, this is what happen:

i can't see what i do wrong, the only thing i modify for the actor is the scale that i put to 0,1 cause i need it in a very large scene where everything is modeled in a 1:10 scale...