Reply to Kontrol S4 MK2 Midi Mode?

I got my S4 MK2 over a month ago now and have been loving Traktor. A few of my mates use Virtual DJ and from what I understand you need to switch into midi mode for it to work (SHIFT + BROWSE), but for some reason this does nothing. If I go into the Controller Editor to change it that way, it does not show as connected there.

Can anyone help with this?