Momentary Mode
Does the light in your DR2 not stay "on" ??? Here is the "fix"
it is possible that a switch can be set to the wrong mode, this can occur after a full device reset.
If you notice that the light does not stay on, then please follow the method in this video to change back to Momentary Mode, 5 clicks is all it takes.
Note - a switch will be reset to factory defaults by holding the button down 60 seconds -
this should not normally happen, but if it does, converting back to momentary mode just takes 5 clicks.
Tech support might ask you to reset the device - if the Self Calibration has somehow become out of sync due to changes in the attached fixtures. In Firmware before v35, this will set the device to On/Off rocker mode - the video above shows how to place it into Momentary mode.