@brett71
I am sorry for the delayed reply. Make sure that you see the library recognised fine in the MUI prefs. Also, try the demos that are included in the NList archive and make sure they are working.
Finally, if I am not wrong, the latest NList require 68020+ CPU. If you have the 68000 you should use the older version which can be found at
http://aminet.net/package/dev/mui/MCC_NList-0.102_68k