Having a problem with collision

I'm spawning some TSStatic objects in the level, but the collision detection on them is very troublesome. These are collada objects exported from Maya that will act as the foundation of the level, but when I move from one section of the floor to another (either by walking or jumping) I almost always fall through it, and often times bullets don't collide either. Sometimes at certain angles things will collide with it, but other times it won't.

I'm wondering if I might have done something wrong on either the model or in code that would be causing this?

The model is set up like so:

Here is the code I'm using to spawn the objects:

function createMyShape(%pos)
{
   %create = new TSStatic()
   {
      shapeName = "./interiors/basicroom.dae";
      collisionType= "Collision Mesh";
      decalType= "Visible Mesh";
      scale = "25 25 25";
   };
   MissionCleanup.add(%create);
   
   echo("Creating room at: "@%pos);
   %create.setTransform(%pos);
}

function mazeStage3()
{
	for(%i=0;%i<$mazeLength;%i++)
	{
	   createMyShape(VectorScale($mazeRoom[%i],6)); //spawn the rooms 6 units apart
	}
}

Anyone able to spot something i'm doing wrong?

PS: I'm getting "Warning: shape basicroom.dae collision detail 0 (Collision-1) bounds exceed that of shape." This tells me I might have done something wrong with the model, but I don't know what.