atomizer not working
 

Somehow I can t use atomizer in logic 8 anymore.
Have the feeling that somewhere with os updating this function stopped working.
Atomizer will not respond to mid notes coming in.
Normal synth sounds work fine.
I create a bus output from a drum audio unit instrument and choose that bus as a sidechain in the Virus VC. In "common" I have chosen 2 outputs/ 1 input.

Everything should work now. I have audio in on the virus side chain but no reaction to any midi notes.
It drives me crazy. What am I doing wrong?