Adding keyboard to my dj set (using ableton live)

Hello I bought my first DJ controller a month ago and as a piano player I wanted to add some piano to my sets.
I have the DDJ-flx4 connected to my computer that has the behringer UMC202 and the I have the Nektar Impact LX49+ as my MIDI keyboard.

When I'm opening ableton live the keyboard is making sound but for some reason rekord box doesn't seem to work or make any sound. I've heard that there's some problems working with multiple applications using the Asio4All drivers or in my case the UMC Asio drivers (that it's "taking all the sound").

I wondered how can I make this work :)