Havin trouble with registerCpRoutes
Based on your code excerpts, things look good.  I've encountered issues with spelling and caps  when referencing controllers and templates within my controllers...so pay close attention to them.

I would suggest referencing the 'Cocktail Recipes' sample plugin: https://github.com/seandelaney/cocktailrecipes (Craft 2.x) as it contains an example of what you're trying to do.

EDIT: Updated link to Craft 2.x version as per comment below.