Bc2000 (for the BCF2000 & BCR2000)

Hi all

Maybe there's already a topic about this but I didn't know what keywords to search for so maybe you can point me in the right direction ;)

I've configured by BCR2000 in Reaper 4.14 using MIDI audio device (BCF2000 preset 1) and I set my own parameters using the automatic fader detector in Reaper. It works very well but when I moove my controls with the mouse in Reaper it doesn't feedback to my controller. If I set the control surface to BCF2000 preset 1, a mouse control in Reaper goes to the wrong button on the BCR2000.
How can I tell Reaper which button control on the BCR2000 ?

Thanks

Matthieu