I can no longer export from sketchup! help

Hello all, I turn to you, since a certain time I can no longer export the model sketchup (House, jump...) in BeamNG, let me explain:
I followed the tutorial of Sam Millington (http://youtu.be/KsTsl5KyJQs) correctly: all whitefaces, in a group, all the good export options check, after in beamng I choose the object, Isee, I selected the collision on the visible mesh and when I pass by car top, I cross, but on the other hand, randomly around the object in offbeat, the vehicle strikes something invisible that must be the object.

Is it shifted? is this a problem of my beamng? My SketchUp?

I need help! help me please

 

The invisible walls is because the model is not on the axis properly

Your model looks like this and that's wrong It should look like this on the axis

 

in fact I started to model on the portal and the rest came later, I put it back on the axes and SA works!
Thank you very much for your help and quick response! you are awesome!

 

Don't group your model and you shouldn't have any issues. The tutorial is a little wrong I think. Grouped items each have their own origin point and torque3d doesn't know what one to use. so your collisions and other parts of your model can sometimes be out of line. I explode every last group and component before export.