I have a problem, i want my donner dmk25pro midi keyboard to be host, and my midi synths to be devices, i cannot check the box , which i believe is the spot, under the in midi device, it says, use as midi channel "x" where x is a choosable 1 thru 16 midi channel option, yet its greyed out, my donner dmk25pro can only control vst's and not my hardware synth. How do i make this happen.