Just purchased GCPO & while playing aroung with it using the Aria 64x player, I seem to be unable to get the mod wheel to change assignment so I can use the crescendo pedal. My KeyRig 49 controller doesn't have an expression pedal, so I'm attempting to use the mod wheel for this function but can't get it to work. The only thing it seems to control is Tremulant Intensity. Any suggestions? Ideas? Thanks.