Hi Jorge,
can you please go more into detail, what did you mean by “when I linked the drum instruments”? What is the Zaquencer version you´re using?
What is your setup? Especially, how is the Vermona connected to the BCR? Directly or with another Synth or Midi-Through box inbetween? Is it the only device connected to the Zaq?
Can you try replacing the Vermona and check if it also happens with a different drummachine or PC connection?
Do you have a USB interface? Can you please look at the note data that is being created by the Zaq to get more hints on what´s happening?