I'm still very new at this, but I loaded my scene using the example posted in this thread:
http://leadwerks.com/werkspace/index.php?/topic/381-scene-loading-example/
It uses the SetSkybox() function in "Framewerk.h"
// Load Skybox
fw.GetRenderer().SetSkybox(LoadMaterial("abstract::FullskiesBlueClear0016_2_L.mat"));
It doesn't look like you're using Framewerk, but you may want to look for the SetSkybox() function in "Framwerk.cpp" to see exactly what it is doing. It reflects everything correctly in my scene.
Hope that helps