Unable to change Midi Ch. and Track settings in GA4 drum map

Another problem. I have GA 3 and GA4 SE and GA4 in Cubase Artist 8. If I use GA3 I can change midi channels and Track outputs in the Drum Map. But with maps created with either GA4’s, I am unable to alter the Channel and Track outputs. They stay on Ch. 1 and ‘Output’ respectively. ???