Having an issue with applying a flat texture to a mesh

I am following this tutorial series but have hit a snag. This picture illustrates the problem:

Basically, the ProcMat texture and the mesh should look alike, with the mesh appearing to be a giant patchwork quilt. Instead, I get a single random color every time I regenerate the object. I have reviewed the code many times and I seem to have gotten it correctly, so I believe that it must have something to do with the way I have set the material up in Unity. Anyone have a good idea just what is going on? I am still very green and this problem is simply beyond my current abilities to solve. Any help would be tremendously appreciated!