Robotronic vocoder vst midi

I have a problem with the vst Robotronic vocoder to work with my Keylab 49 keyboard.
i can play midi trough the vst on my desktop, but not in Cubase 8 pro.

I want to use Robotronic as a insert on my vocal track, but i can’t send midi notes to the vst.
all other instrument track works fine to my midi.

Do i something wrong here?

Thanks by advance.