My building not showing in asset editor

[SZyMeX]

Hello,
At the beginning i must say that my englisch isn't very good :c

So, i have a problem with my building. I downloaded model from sketchup warehouse and then i followed this tutorial:

Everything was good but when i try to import my building (46 minute) it doesn't load and the "continue" button is frozen :/

What i do wrong?

This is the model i trying to import to game:
https://3dwarehouse.sketchup.com/model/cb5602cef202147650336112dffe8551/ALLCON-park-3

 

[mntoes]

Never used Sketchup so I can't really help. One thought though, have you got the model as one object. Have more than one and it will not work. Least not for me.