The color math node (must be color math) should be set to divide, not cosine. In the root, set diffuse value to zero. The glow boost adjust color block should be some shade of grey, but not black - that would be dividing by zero.

You won't see any lightcasting effect until you render, but you can set Superfly to progressive and quickly see if the effect is working. It will cast light even if there are no Poser lights in the scene.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5