Allen & Heath DB4 and K2 Controller not recognised by DJ Pro (Windows)

I have the demo version of DJ Pro and if it all works out I will for out £40. However not everything is working. DJ Pro has found my DB4 but when I load a song from Spotify I cannot play it in external mixer mode. When I press play all that happens is the deck light turn on, platter spinning but no sound.

Secondly I am trying to MIDO map the K2 but nothing happens in the MIDI configuration or advanced Control options. When I press a button on K2 nothing happens.

Any help would be great as I love the thought of Spotify integration but currently not playing nice with A&H…