I have Kontakt 6 - works fine. I selected the correct midi input and output in the options page, press a key on my keyboard and I can hear the sound. All is well.
I have Kontakt 7 - I select the correct midi out and midi in, play a sound with my keyboard - but no sound comes out. I can see that the midi in lights up in Kontakt 7 when I play a key but no sound. If I switch Kontakt 7 off and try a Youtube video, I just get a spinning ball (it doesn't play the video) and i have to restart my computer. Any help appreciated. Thanks.