problem with connection between Microham DXP and N1MM logger

I am having serious issues connecting N1MM-logger to my FT1000MKV via the Microham DXP.

No matter what I try, the frequency is not being read, and the CAT is not working.

It is not related to hardware faults because when I connect WSJT-X in this way, everything works immediately.

I suspect a problem with the DTR and RTS settings, but all combinations yield the same result: no connection. Tried with another laptop: same result.

I've found nothing on the internet describing this problem. To be continued...