Reply to fls 9 and the mp24

i've been using the mpd24 and fls's FPC together and it's quite fun banging some drums and samples out of the pads. but, i can't figure out how to use the knobs or sliders. the transport buttons work. is there other uses for the mpd24 in fls9? does anyone here have any ideas on utilizing this controller properly, or is the pads and transport buttons it?