New to exporter: some meshes not showing up

Hi, I'm new to the Maya2dts exporter and couldn't find the help I needed in the other threads here.

I'm sure this is something simple but...

I've exported 2 files and only 1 works properly:

File 1:
-created cube1 and cube 2 (door and doorframe), modified cube 2 to look like frame
-triagulated, created bounding box, embedded shape, registered details
-registered details shows detail1 and detail 2
-Exported
-only detail 1 shows up

File 2:
-created cube1 and sphere1
-triangulated, created bounding box, embedded shape, registered details
-registered details shows detail 1
-Exported
-both shapes appear no problem

I froze all transforms, triangulated and deleted history in both cases. The only difference is shaping the doorframe in file 1, which doesn't appear.

Seems simple but any help would be great.

Cheers,

Art