NifSkope Collision Meshes Missing

[WIGWAM]

I'm trying to create a new tile using vanilla assets in NifSkope. I've managed to get the tiles into the creation kit but in game you just fall through the floor and can walk through the walls. Also the blue marker arrow is visible in game.

 

I created the tile by copying the branches of another tile, each object has the bhkNPCollisonObject branch so the only thing I can think of is if one of the values is set wrong. Any Idea what this could be?

[SydneyB]

Open two windows of NifSkope and set them side by side. In one load your nof file and in the other one load the vanilla nif file you've used as a template, and compare all the values :)

[WIGWAM]

Thanks, I've tried this and although there were things set wrong after correcting them the problem still persisted.