Keeping the pitch within kontakt

I have a question regarding kontakt. I'm using it in a live situation. We have a sample that is 16 bars long which I've loaded into kontakt. Our drummer doesn't play with a click some I'm wishing to slice the sample up into 2 bar lengths and than trigger each part of the sample from a different key. He can quite happily keep time over a two bar count with the sample. However when I'm triggering a different key the sample changes pitch . How do I tell kontakt to simple play the sample at the same pitch regardless of which key I press.

Thanks in advance

Keeping the pitch within kontakt