Start with all of your controls zeroed. In this case, this means that the two CV controls are at dead-center, and everything else is down. Then send it triggers as you slowly move the controls off of their zero points. My suspicion here is that you don't have the "Pitch Decay" and/or the "Amp Decay CV" set properly...the latter one, especially, since not everyone expects a control like that to be capable of polarization. However, since drum pitches do tend to change as the sound decays, those attenuverter-type controls are necessary here.