Was tired of carrying the Yamaha S90ES around, and the Artis7 seemed like the best lightweight board. Well I was a little hesitant because the forum consensus seemed to be that the keybed is too stiff, but I have taken to it in short order and have already setup my setlist as a sequence of multis, that also send patch changes to my Korg. I just figured out that when you layer a kb3 patch in a multi, you have to reassign the drawbars and switches. So far I am digging the board a lot!
Try setting the KB3 as the first layer/zone. Also, in PC3 series (I don´t know about the Artis) there is a template setup called "internal sounds". While you start with this one, the controlers are set to the first sound you use, like in program mode.