Help: Imported model won't show in world editor

[Marshmalo]

Hi, I've imported a custom space station model into my map but for some reason it dosnt appear. However, the model works fine in the Model editor and WC3 Viewer, also, when I go to place the unit in the world editor the transparent bit shows but when I actually click to place the unit down it disapears.

(see screenshot below)

Please can anyone tell me what I'm doing wrong or if theres somehting wrong with the model?

I've checked the texture paths and it only uses one texture which is fine.

Model File:

http://www.hiveworkshop.com/forums/pastebin.php?id=xokcxq