Hanging notes when using sustained instruments in Kontakt 4

I have the problem that when using any kind of instrument fromthe Kontakt 4 library, the notes are hanging. It doesn't happen with any other articulation I choose. And it must be Logic related because when I run Kontakt as Stand alone, it works fine. How can I get rid of the hangng notes? I searched in Logic for settings but can't find anything that helps me.

I found out just now that when the notes are hanging and I press my sustain foot pedal, the hanging is gone. But this happens again and again, so this problem is connected with the sustain pedal.