Expert Sleepers Usamo & Soundcraft mtk12 issues

[aiaiai333]

Hi everyone. Has someone else also problems with the Expert Sleepers Usamo and a Soundcraft mtk 12 Mixer? I´m using Ableton live 10 as DAW, Windows 10 and I want to clock a Digitakt for instance. I´m sending from the ableton plugin with activated USB return (on the mixer) to a track 1 on the mixer. This track sends to the group 1-2 ouputs and they send audio to the input of the usamo hardware. LED show activity but the digitakt behaves strange. Sometime it receives something, starts and stops whenever it wants.. Tried the same with sending via the aux outputs, but same behaviour. I tried the Usamo at a friends place with a tascam USB interface and it worked perfectly. I guess it has something to do with the USB-return. The level shoudn´t be a problem, but I think that makes something with the audiosignal..
Any ideas/experiences..?
Cheers, Paul