Make sure you have the installed the latest nio installer from here
You'll need to wrap the nioFXrack in Plug-In Manager. Then load the nioFXrack (Automap) version. Then if you look in the Automap GUI, you will see Parameters 1-40. Then right click over the nioFX rack to assign which parameters you wish to assign a control to.
Or you can use the learn function on the Nocturn to learn.
If you find you cannot learn some parameters, using the 'Automation Enable Hilighting' feature is a useful way to see which parameters are actually automatable.