autch -not usb will be hard -what connection/ port do you use then?old Yamaha MIDI (not USB) Keyboard
I think you need to give way more info on the tech /hardware, if anyone shall be able to give you any help - i know i wont be able to, but more info is definately needed.
If you do get it to work, i think it would be a good thing to have a 'how to' here on the forum