can anyone say why, please?

This is a Kontakt 2 KSP preset instrument . I opened up the Script Editor and I can see the 6 "Strings"; Sustain A/E/d/g/b/e1 but when I play a note triggering any of the top 3 groups, there's no sound, although I can see "Upstroke" "Downstroke" etc in the display.

I'd appreciate any help as there's probably a simple solution-thanks!


Using Kontakt 2.1 in Logic 7.2.1