Komplete Audio 2 - Can´t make pre-listening in Traktor 3 Pro

Hi, I am having a problem with my Komplete Audio 2 interface. I´m using a pair of external monitors (Master) and headphones (Monitor) to mix in Traktor 3 but I can hear the pre-listening of any of the tracks. I don´t know if it has to be related with my Output routing or with the interface itself. I´m using the ASIO4ALL drivers besides of the Komplete Audio installed ones. The ASIO4ALL gives me more channels to try to configure the Master and the Monitor at the same time if not the prelisten would sound through the monitors.

My system setup is:
Windows 10 Pro
Traktor Pro 3.v3.2.1
Kontrol X1 MK2
Komplete Audio 2
2 Studio Monitors XLR routing
Komplete Audio 1 & 2 Driver 4.59.0 - Windows 10

I have also checked the Mix and the Cue volume in Traktor and the knob turned to host in the interface.
Any recommendations are welcomed. I include some pictures of my routing in case it helps.

 

What happens if you set Output Monitor Komplete Audio 2 Channels 3 and 4?

 

It doesn´t reproduce any sound through monitors. It only reproduces sound if I set ASIO4ALL and the output in channels 11-12.

 

It doesn´t reproduce any sound through monitors. It only reproduces sound if I set ASIO4ALL and the output in channels 11-12.

 

Do you absolutely need to use ASIO4ALL? I think you could route the different outs quite easily to Komplete Audio 2's outs using NI's native (heh) ASIO driver as your Audio Device under Audio Setup in the Preferences, couldn't you?