Collision fixed

When importing objects into UDK, if they are convex shapes the collison does'nt work properly. In the image above you can see I've fixed this problem by adding a hole at the top of the mesh. This means the object is a solid shape. I plan to add a second shape in UDK to cover up the hole and effectively make it a solid shape.

I tried to import it into UDK and the collision works effectively.