Bullet serialization from Maya not saving components

[Goombario]

So I'm making a game using Bullet Physics. I'm making the models and collision structures in Maya, and then saving them as .bullet files to load into my program. The problem is that when I load them in, they've lost a lot of functionality. For instance, the collision shapes are set as primitives like boxes in Maya, but turn into compounds when I load them in C++. They also lose names, and components like restitution and friction. Am I doing something wrong, or is this an issue with maya/bullet?

I'm just using the default Bullet loading class.

.bullet file and maya ascii files attached.

[sky10086]

How did I solve it later, I have the same problem now