It's definitely in the right place I've installed loads of mods before, and I can see it's in Modules cause I've been messing about in there to get it to work.
When you installed it, it is not a folder-within-a-folder situation is it?
(Whigs and Tories Beta -> Whigs and Tories Beta)
it should just be Modules -> Whigs and Tories Beta -> Text files, Resource, Textures, etc of the mod folder.
Else, where did you download it from? Moddb? May be a broken download.