midi not working simultaneously

Hello, did someone had issues with midi not working when the synth control program is open - Korg “sound editor” in my case. when the sound editor closed the midi works on Cubase and doesn’t work on the editor (no midi input) And vice versa when the sound editor opens the midi is not working in Cubase. :upside_down_face: Cubase 10.5\ win 10
I have installed Cubase 5 on the same pc and it works, on Cubase 10 it doesn’t work. any suggestions? :frowning: