ASE to UDK Missing Partial Collision

[Anonymous]

I've been having a lot of trouble getting my custom mesh with custom collision imported correctly into UDK.

In 3DS, I have all of my collision named correctly and it all shows correctly when exporting them, But when I import them into UDK, half of my collision goes missing. I have tried many different ways of exporting and importing, but the closest I have gotten to it being correct has my collision messed up.

I have followed this tutorial to the letter and I still don't know what I am doing wrong. 

Here is a picture of my custom collision mesh in max:

Spoiler

And here is the result after importing into UDK:

Spoiler

Any help would be greatly appreciated.

Thanks