Hi Adam, welcome to the forum.
What version of Kontakt Player are you using in your setup? Did you "upgrade" from VDL 2.5.2 (or older), or did you do a fresh install with 2.5.5?
Please attach a screen shot of your Playback Configuration.
What version of Kontakt Player are you using in your setup? Did you "upgrade" from VDL 2.5.2 (or older), or did you do a fresh install with 2.5.5?
Please attach a screen shot of your Playback Configuration.