Traktor kontrol z2 phono inputs do not have signal, any thoughts?

I didn't find such a setting on the audio interface preferences, or in traktor preferences. Can you please show me where I can find it? On the preferences table of traktor, a signal is shown when the turntable is connected (through another mixer) to the line input, but when connected to phono the signal is completely lost . Of course the switch is turned to phono.

The problem occurs also on standalone mode. Seems like the mixer has dead phonos

Both manual and setup guide are showing that the turntables have to be audible since they are wired to the device . From the manual:

"3Connect turntables, CD players, or other stereo audio sources to the INPUT connections (channels A and B) on the rear panel, turntables connect to the PHONO sockets, CD players connect to the LINE sockets. 4. The PH-LN switch at the very top of each channel on the top panel must be at the appropriate position in order for you to hear sound from that channel. If you have hooked up a turntable to the channel, be sure that this is switched to PH ("phono") and if you have connected CD players or other line-level inputs, the position should be LN ("line"). 5. Turn the MASTER output knob all the way down (to the left) to avoid unexpectedly loud levels. 6. Make sure that the TRAKTOR buttons at the top of each channel are off (not illuminated). If your Z2 is not connected to a computer, both buttons will be off anyway. 7. Connect the MAIN OUT outputs to a mixer or a pair of active speakers. 8. Plug your headphones into the front panel. 9. Get some sound coming from your turntables or CD players."

From the setup guide:

"After you have connected the second turntable, your TRAKTOR KONTROL Z2 system is complete and should be connected as depicted above."

It isn't mentioned anything about signal routing on different channels. It seems that the signal has to be present since the turntables are connected to phono, but in my case there is no signal.