mrheid
Thank you for the reply. I don't think pad/note assign is the problem due to the midi keyboard and the drum module both have the same result: no trigger session drummer, yes trigger other vst.
So what note number are you sending, specifically?
Also, is SD set up as a Simple Instrument or with separate MIDI track(s) and multiple audio tracks to host its multiple outputs?
If it's a Simple Instrument track, try splitting to separate MIDI and Audio tracks, and verify the MIDI track is echoing input to its output. If not, and you're relying on "Always Echo Current MIDI Track" in MIDI preferences, try forcing Echo On.