Need to raise your seat like. Kona's are really poorly designed that way - The seatstays will rape the seat/seatpost before the shock is fully compressed.
So that the back of the rocker links are lower than the seat when the suspension is fully compressed. I run mine this high www.pinkbike.com/photo/4721978 Ive a feeling it still hits the post on full compression but theres nothing I can do about this - poor design on kona's part, I'm not sure if there is still the same problem on the newer bikes.