Bc2000 (for the BCF2000 & BCR2000)

i figured out how to assign manually but i still cant get the learn
function to work at all.
ive tried it the behringer way by clicking learn on the bcr assigning
a knob and tweaking the knob in the program. no go like that.
and ive also clicked the learn in the reaktor program and twiddled a
knob on my bcr and nothing there either.
if im doing it the last way described should i have a CC number
asigned to a knob before trying it? or what? it seems theres a grey
area there i cant quite get to work.

thanks for the help