I'm getting back into Fallout 3 modding to prep for Fallout 4 release.

I'm creating a custom Vault, and am having a little issue. I place "VHallSm1WayWin01," and for some reason the inside wall is invisible (both in game and in editor). I've tried all the other vault windows, and the same issue is persistent across them all. I've checked other vaults that use the same window object, and they have no issue. I don't understand why it's only happening in my custom made vault; is it a setting or something?

Thanks in advance!

Edit: I just realized it's not just the window object. It's both walls that fall on the inside side of a room. One is a regular hall (VHallSm1Way01) and the other the window (VHallSm1WayWin01).

Here is a screenshot: http://i.imgur.com/1KUmb8x.jpg

Here is a screenshot of the same area, but the opposite side: http://i.imgur.com/MrHNKE5.png