Opens and renders fine in Vue 7 Complete 64 bit Vista
Doesn't open in Vue 6 Prostudio, but that's because it's been saved from 7 and .vue files aren't backward compatible.

I unchecked the billboarding on the nebula as it gave me more rotational range, then duplicated  it twice and recolored. My final on this is very large so I had to do a tiny bit of postwork on the planet edge to get rid of minor jaggies.
Click for the full size version