Help with Session Drummer please

There is a table in the Session Drummer help that shows the note mapping. Right-clicking the instruments at the top of the mixer view in Session Drummer also shows the instrument name/note mapping. The instrument name is also displayed on the left-hand side in the Piano Roll View. The PRV may be the best place to go first because it also shows the notes being played.

C3 (note number 36) should be correct for Session Drummer's Kick, and you should see the note events on that line in the PRV. If not you can click the drum name on which the events are showing up to select them all, and Shift+drag them down to "BassDR" (Shift keeps them from moving in time).
 
P.S. If you right-click the area where the drum names are shown in the PRV, you can select "Use these Note names instead", choose 0... 127, and you'll see the corresponding note numbers.

OK, WTF?  Did the same thing on the snare with D3 the note and it worked perfectly?  Why not on the kick track?  GRRRRRRRR

They aren't.  That's the problem.  I'll try another kit and see what happens.  The snare in that same kit worked fine though.

You can also load individual instruments by right-clicking on the instrument and selecting an appropriate sfz file.

Session Drummer

I might know what the problem is.
 
Shot in the dark here, but I had a weird thing happening yesterday that sounds slightly similar.
 
I had used audio snap to replace a snare, using SD3 as well. I noticed that below the standard keyboard notations to the left in the piano roll there were some additional labels that were not the standard thing (no letter/number, but a few things--can't remember exactly). I pressed one of the keys (using my mouse) and suddenly was hearing different notes, in sort of a rhythmic fashion, play, just going on and changing sounds. I didn't put it together at the time that it was going through all the sounds, but that's probably what I was hearing. I finally figured out how to stop it though--looked down at the bottom of the key notations and saw one which was labeled "Stop." That did the trick, and everything worked fine.
 
Can't say for sure your problem is in any way related, but it sure sounds similar. Let me know if you see what I describe, and if the "stop" key solves the problem?