Why does Prefabs loose children and effects when instantiated on Windows Phone 8?

Been looking for answers for some time now, and haven't been able to find any.

I have this Prefab 'Sun' which contains a 3D Sphere with a Halo and a Point Light as child..

When testing on my PC all these props are instantiated together when the whole Sun prefab is instantiated.. All functioning as I want it to!

Now my problem is, when I build the app and run it on my Windows Phone 8, it seems like it's only the sphere that gets instantiated when the prefab is instantiated. No Halo, no light..

Another interesting fctor - If I load the sceen WITH the prefab already in it all the props are displayed (Sun with both sphere, halo and light!)

Any suggestions to how I might fix this? Thanks in advance..