Cubase elements 11 and Tal-vocoder

I have added Tal-vocoder to a sång track and added a midi-track that I have connected output to Tal-vocoder. I can see that the miditrack controlls the vocoder but I only here the original song-voice, no vocoder when I play the track. According to a youtube tutorial I schould not here the song after the vocoder is added to the song channel but I do here it so something is wrong in this first step. I have tried to turn the vocoder on and off, tried to mute and solo on all possible ways but its not working. Can you help me? I do here some little clipping sound from the midi signal.