EcVh0 Iray Skin Shader for Genesis 8 Female dosnt seem to do anything

Anyone have this product? i just bought it and double click the differnt body part shaders to load them on default genesis 8 female. nothing seems to change rendered a version next to default genesis 8 and looks exactly the same. Im new to daz, so quite possible im missing something. cant find any documentation on how to use this i assumed you just double click to load like the tooltip says. also tried on modified genesis 8 it just made a mess of the texture or something. any tips would be appreciated
thanks
Comments
You have to go first to the Shader Tab and activate the parts you will load the EcVh0 Iray Skin Shader to!