takeover problems with oxygen

Hi
i bought a new keyboard, my first midi keyboard, the m-audio oxygen 25. i want to use it with ableton. now i want to midimap the knobs and the fader and use the midichannels to control more than just 8 rotarys and one fader. but when i change back to the first channel, the takeover mode doesn't work and the parameter jumps up right to the next midisend value.
any solution? please help me, i'm a ittle bit frustrated

Is it set up in live as "Oxygen 3rd Gen"? That could be your issue.

yes, it is. set up as oxygen 3rd gen, track and remote on for in and output. takeover works, if i change the value of the parameter with the mouse or another controller, but takeover with the oxygen midichannels doesn't work.