having issues with skin

i currently been having issues with the skin render, it get glossy and shiny for some reason and i don't know how to fix this issue
modelling of 3-Dimensional characters
http://www.makehumancommunity.org/forum/
http://www.makehumancommunity.org/forum/viewtopic.php?f=18&t=24488
joepal wrote:If this is in blender, try adjusting the "roughness" value in the materials panel. A reasonable value is 0.4.