World Editor Not Recognizing MDX (+rep)

[BlueSin]

I have a set of 8 number tile models (not created by me of course, never got into modeling), yet I can't get World Editor to recognize them (yes I restarted World Editor). But I can see what they look like when I open them in Warcraft 3 Viewer. Anyone know what's wrong, or can get the attached model to work in World Editor?

Thanks.

 

[Evan1993]

Do you have whitemarble.blp and blackmarble.blp imported?

 

[Chocobo]

Textures\White.blp required.

 

[BlueSin]

It's been a while since I've worked with WE. Sorry for that. Plus rep to both.