Reply to Midi Fighter in Traktor, no sync anymore ?

Cheers,

I have a problem. My setup looks like this.
Traktor Pro
M-Audio Interface
Behringer DDM 4000
Akai Mpd 24 as Midi Fighter

Everything is working fine, but sync ist not working anymore ;/
Traktor dont jump in sync mode on any track.

Maybe you can help me


Best regards