SSS Only shows up in iRay

[Hitpawz]

How do I get the Subsurface Scattering to show up in the working viewport where I can adjust my materials?

I have "Enable" checked under Subsurface Scattering in the Shader Parameters
I have "Activate Subsurface Scattering" checked under Camera Settings in the Display Settings
I have a "Scattering" Channel in the Texture Set Settings
I can preview the "Scattering" channel when I cycle modes with "C"
I can see the Scattering just fine in an iRay rendering
I don't see squat in the viewport

Thanks