Korg Kross midi controller Native Komplete on Nuendo 4

I have just bought Native Komplete 10 and I would like to know how to set up my korg kross as a midi controller to use this software and record using Nuendo 4. I assumed as it is USB to computer then it should work as a midi keystation but i have read the Korg manual but there is nothing to say how to set up as a midi controller.