Reply to Help! Sampler button fail

So I installed the new mapping for Traktor Pro 1.2.1 and that fixed a lot of stuff but the Sampler button still does nothing on the controller. Well not nothing exactly - it turns delay on in the FX1 slot but only while the button is held down. It doesn't do the fancy beatmasher thing that it used to do with Traktor Pro 1.1.2. Any suggestions what I might be doing wrong?