You would need to start a new game to see the mod in effect (if you haven't already). Unfortunately game saves lock in what mods they use when a new game is created, and it's not possible to change mods mid-game without save-game editing.
You could add the changes to your existing mod. I believe you have a post about the "Blank Mod", anyone reading this, you are best served if you start any game to at least choose that when you start a new game, that will give you an avenue to then merge mods into that (which is on the easy side) and have it go into affect each time you play with no start overs.