Repeatable CPU click in Kontakt

Weird. I’m getting a repeatable CPU spike and click with Alecias Keys in Kontakt 4 cubase 5.1. The click happens at the same point every time i play my sequence. Kontakt is the only instrument open and i am at 20% cpu.

Have tried to play the sequence from different points and if I play from right before the click point it doesn’t happen. Must be one sample which is corrupt or something?

Any ideas?

contact Native Instruments…?!