XDJ-RX and Rekordbox DJ; some knobs not working?

Hello,
i have test the XDJ-RX with Rekordbox DJ, and i'am happy that i have this possibility.
But my effect knobs doesn't work. The On/Off Button for Beat FX has no function, and the Color FX Buttons switching off a Effect, but not on.

What I'am doing wrong?

Kind Regards