DMX-1 LAG ISSUE

Hi. I was very exited to get the DMX-R1, but i have a serious issue.

Firts I test it only with the dmx-r1 conected, using the internal audio from the lap top. No problems with that, works perfect.

But, as soon as I connect the rest of my equipment the problems will begin.

DJM 450 & Traktor Kontrol x1

I have years now playing with rekordbox with this gear with out a problem ever.

in combination with the dmx-r1 there is always a serious lag.

my laptop meets rekorbox specifications. processor core i5 2.5ghz 8gb ram (lenovo thinkpad t420) I already tried to reinstall the program, and modify the parameter +500 - 500 ms compesation. and no change.

Also I tried connecting only two of the devices, DMX-R1 & traktor x1 together they have no problem,
as soon as the DJM-450 comes in again, the problems start again
Can you help me please?