I usually do not have problems in turning the knobs of the avionics 'built-in' in X-Plane as, for instance , the Garmin 430. I do have problems, however, in turning the knobs in the add-on CRJ-200 model that I purchased separately from X-Plane. When I hover using the mouse over the knobs of the CRJ-200, 2 curved arrows appear (with opposite directions) around the knob. But when I click on either arrow, nothing changes on the displays. I cannot change altimeters settings, altitudes, speeds, and so on.
Could somebody help?
Thanks