Allen & Heath Xone:K1 "User Mapple Faders" Serato Dj

Make sure that the K1 is in Midi mode and that the latest firmware is installed.
Then make sure you have enough USB power with all those things attached, you might even run into a Midi Channel problem, so the channels used by the K1 might overlap with Maschine the AFX or whatever. Usually there is a channel guide in the manual.
Midi is only 256 channels so if you used that up, you need to get rid of something.