Reaktor 5 automations

[PiLLO]

i have a strange problem that i didn't have with ableton 5!!
when i moove some pot and fader on an audio unit(not only reaktor) i can see the movement of midi control in ableton audio unit window, but if i assign that control to a midi controller in ableton, the pot an fader doesn't moove!! it seems a communication problem i think.
that's happens only on certain ensambles, others work good!!