Which input you use on the module?
Eureka, I had it plugged into the crash cymbal input and your comment made me change it to the tom input and both channels now work. Not perfect but at least movement in the right direction.
So both channels work now with different sounds. Seems a shame you can't alter the trigger of the cymbal rim channel AFAICS.
One thing I have been trying to do is find some engineers menus. So far I have the following.
hold up, down & power = hidden systems test menu
hold left, right & power = factory reset
hold Record, Start/stop & power = some prompt with serial and date inputs but cant do anything after