I have a Reloop Contour Interface and A&H K2. I want to sent them up in Traktor so the contour handles all the deck stuff and the K2 works as a mixer. I have mapped them so they work that way but I cant get them to work together.

The Contour on its own works fine but with the K2 plugged in it just stops working.

I have set the in and out ports on the mapping to relevant device and made sure they are working on different midi channels

Any ideas how I can get them to work together?