Okay, Wulfe... you need to go to the website called "stickworks" or something like that, and get Bob Church's driver for the X-36... it will patch your X-36 into thinking that the other input (pedals) is actually part of the same X-36.
It's been a couple of years since I had to do that, and it was a little complicated... but follow the directions and it should work okay for you.
There were some other system req'ments also, IIRC... make sure you read alll of the "Read me"s.
GL.