Cycles Normal Mapping

I’ve been attempting normal mapping with three models now, and finally a normal map has worked in general, but when I try to apply it, it only produces a slightly-more shaded low-poly mesh.
Low-Poly http://i.imgur.com/koqYqbe.png
High Poly http://i.imgur.com/fCvabS5.png
The nodes are there as well as the UV-normal map. I’m so confused and I haven’t been able to find any other person with the same problem.