DDM4000 and Traktor Pro with MIDI ( led and headphones issues)

I set the DDM4000 as internal mixer, and all the volumes and faders work .. but not the pre listening.
I connected the two MIDI cables (in and out) to the external sound card "M-Audio Fast Track Pro" and RCA cables from DDM4000 (Line 1 and Line 2)at the inputs (1-2-3-4) of the external sound card .
All this by USB to the MacBook Pro.

I set all the channel in traktor pro, maybe there's something to set in DDM4000?

But I set: the 4 channels, the crossfader, the mic channel as MIDI

help me please

 

If you set the DDMs channels to midi the CUE buttons also are Midi and do not work audiowise any more. Set Traktor to external mixing, the DDMs channels not to Midi and use traktor just as playing device...

 

ok..thanx so much. Now I try =D
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Then I set in the MIDI section of the DDM: Channel = 4, MIC-SAMPLER-crossfader and MIDI working, and the Channel 1 - 2 that do not work in MIDI.
There are almost .. just that in channel 1 the volume is very low compared to channel 2, and the crossfader is not working while the volume fader yes.
In Traktor is the OUTPUT ROUTING--> EXTERNAL MIXER-->channel A (L-R) - channel B (L-R).

I check everything again but I have found what may be .. please do not leave me right now = D
Thank you very much

(Sorry for my English but I am from Italy)