Hi. It's been a while since your post but I just registered and read it. I think you just need to Control-Click (Apple-Click on a Mac) on the parameter, hit the learn button, and move the controller knob/slider you wish to use. Hope this helps.
Now if I could only figure out why it won't learn 2 of my controller knobs. Anyone with ideas? and what about the presets? I can only get 2 to work. Could it be a computer issue?