Bevel on inner edge not working

[squiddingme]

I have two models.

http://dl.dropboxusercontent.com/u/28629176/gamedev/models/bad.blend
http://dl.dropboxusercontent.com/u/28629176/gamedev/models/good.blend

Both are exported to .obj format from sketchup and then imported into blender.

When I try to bevel the inner edge of this part on the bad model, nothing happens:
http://dl.dropboxusercontent.com/u/28629176/gamedev/models/Screenshot%202013-12-09%2001.27.08.png

But on the good model, when I try to bevel that same inner edge, I get bevels:
http://dl.dropboxusercontent.com/u/28629176/gamedev/models/Screenshot%202013-12-09%2001.27.21.png

Why doesn’t the “bad” model allow me to bevel?

[Richard_Marklew]

If you hide the top face you will see another face connected to the edges you want to bevel. Delete it