XDJ RX2 Track not loading to Deck 2 in MIDI mode

I have connected a windows 10 laptop to my RX2 to use in MIDI mode and I cannot get tracks to load to more than 1 deck. If I load a track to deck 1, nothing will load to deck 2 and vice versa. I have installed ALL the relevant drivers/firmware etc and have read the operating guide and I have NO idea why it's not working. Any help would be greatly appreciated!