Hi David, I don't understand, are you talking about the Nano Kontrol Studio which does not have a LCD as such, just buttons and sliders or do you mean something else?
I have , using Time Machine put my iMac back to a date before I acquired the controller, installed the necessary software i.e. Midi usb driver, Surface plugin, studio editor and system updater after reading the manual several times but still to no avail.
The editor is set to Assignable with the scene 1 set to Sliders 1 & 2 to control CC7 and CC11.
I then click the Write button which confirms the message is sent. Close down editor and open LPX
Parameters still showing volume for each track instead of Expression on Slider 2
My midi/audio set as shown: