what MIDI mapping are you useing
not familiar with the controller ,,
two possibilities come to mind ,,that this control is a mechanial ,not sending a MIDI message
open up preferences /MIDI maps ,, when you use the control on the controller does the green online flash
are you seing what looks like a ghost control in gui over the master ,, ,,if so can you sync the ghost to the gui postion and gain control of the gui