Falling through my large RigidBody city?

On what?
I'm just a guest here. And for some reason was banned on 3DRad Forums.

I'm glad I wasn't too late. Did you get the personal message I sent?

It's almost done. Ooh I'm excited!

You're welcome. Is your game made yet?

Alright.
Thank you so much!
I got everything fixed. This is AWESOME! Thank you!!

Then a harder way to get it to be fixed is to make all the faces be 3D, and not be flat. If that doesn't work, then make a simpler city without any curves or anything complicated. And you aren't bugging me.

I've already tried that, it still doesn't work.
And I'm terribly sorry if I bugged you.
I reversed the faces on many different sketchup cities but it still never worked. I've exported as static, dynamic, mass thingamajig, skinmesh, and nothing works.
And, even if I don't fall through it, then when I drive on it, it sends my car crazy.

So sorry about not replying. I couldn't get into the forum. And for your city, you should try pressing Ctrl+A to select everything and then right click on the model and click reverse faces. Then click export as static rigidbody. You'll need a skinmesh of it too because the faces are reversed. I hope I'm not too late!

Oh please DogsOfKnowledge, help!

Oh sorry, I'm using Sketchup.

I need it pretty soon. My game release is this June and I need this done and sell-able.
Please help me fix it! Thank you!

Yep.
Could you please fix it?

Are you using Sketchup or some other modeler?

Ok, it's not mine, but I may use it.

The problem is I have a rigidbody city. It's large in size, and in model. I need someone to help me convert it to 3D Rad DirectX. Because when I do, there are so many holes in my model that my character and car falls through.
Please help me convert!

City dl: 4shared.com/file/zrl_WhJM/PARADISE_CITY_FINAL.html