Nothing appeared when clicking "Use Probability Emitter"

FUSE let me amazing for a long time.
I just have a simple question.

As the picture, the patch “Use Probabitlity Emitter” doesn`t appear anything.The other 4 sample patches in this picture works very nice!

I tried:
1. press F9 to restart
2. close and open vvvv gamma
These two method did not solved this question.

My version is vvvv gamma 5.2

Please help me.