Normal and Bump Maps

I've made a bump/normal map and I'm trying to put it on my model. It works fine on a flat plane, but if I try to use it on a mesh, it does not work. I go to Materials's Shader: Standard. Put in my texture/color or albedo- no problem. Then I go to Normal Map, and add my generated normal map from grayscale. Nothing happens. It shows as attached, but that's all. I tried to add it to the floor, and it works fine, but no models from Blender. Any help?