Getting m-color to work in Autocad 2023

All

I am a long time user of mcolor going back to the early days with Autocad v13, such a shame m-color is ceasing. Anyway in an attempt to update and enable me to carry on using m-color I have loaded a full version of Autocad 2023. I used CUILOAD to select the m-color menu and it successfully appears in the ribbon menu bar. However no on the m-color meus work.

Have I made an obvious beginners mistake?, any help to explain how I can get mcolor working in Autocad 2023 woudl be very much appreciated.