You did not really respond to any of my questions — so let’s try this a completely different way.

MODX stop plays
MODX stop plays when I played live, without computer and Cubase.

If you are are trying to say you have problems with your MODX even when not connected with the computer. Then we should STOP trying to hook it to the computer until you fix or figure out why.

Connecting it to the computer will not magically fix a problem with your MODX. Please completely disconnect the MODX from all external devices. And we’ll help you troubleshoot this first problem.

PLEASE STOP trying to connect it with Computer/Cubase. Let’s first figure out why your instrument “...stop plays when I played live, without computer and Cubase”.

Please post the exact Performance that this occurs on... is it a Factory Performance or one you created yourself?
We’ll ask one question per post so you can give direct answer.