I have the Roland Duo EX and it works fine with Cubasis. Do you have it set to Tablet mode on the back of the unit? In Cubasis make sure you choose UA-22 as the routing inputs (this is what it shows up as for some reason). Also make sure your tracks are record enabled (the red circle is lit) and if you want to monitor your instrument as you record then make sure the yellow speaker is lit on the audio track.