I am trying to set my mesh as the Cloud Model in WorldSpace, although, I am having trouble. I set my mesh as the Cloud Model, and have "Use Map Data" unchecked, and when I load my save, it hangs on the loading screen. Is there some other setting I am missing in my esp?

Here is a screenshot of my settings:

http://img24.imageshack.us/img24/3672/95408612.png

(land0101/mesh.nif, is the location of my mesh)