I have Studio Pro 4 (ver 4.0.148247). I dont know if I'm missing something but I have tried to get the Impact XT pads to operate in Loop mode with Toggle set. If I use the mouse to play a pad on screen directly it latches as expected, however it will not latch if I use the software QWERTY keyboard(to trigger pad) nor with the pads on my midi controller keyboard. Am I missing something or is this a fault?