Importing 3D PDF into FrameMaker

[D L Reynolds]

I'm trying to import a 3D file into FrameMaker and having no luck at  
all. According to everything I've read...
- the file must be in U3D format
- Acrobat 3D should be used to convert the original CAD file into U3D  
format

I've used Acrobat 3D to convert the CAD file, and per instructions in  
the Acrobat documentation I've selected the U3D ECMA 1 option from  
within the Import tab > 3D Format in PDF. A file is generated with a  
PDF filetype, and my understanding is that somehow, internally, the  
3D data are (or should be) in U3D format.

Once that's completed, I import the resulting PDF into FrameMaker.
- The Imported Graphic Scaling dialog box isn't displayed as the  
FrameMaker documentation says it will be.
- Nothing appears in the graphics frame; i.e., there is no preview.
- When I export into PDF format, the image appears but Acrobat 3D  
doesn't recognize it as a 3D object.

When I convert the same CAD files directly into PDF, everything works  
fine. But this 3D image is part of a formatted data sheet, so I  
really need to include it in the FrameMaker file.

I'm using the Technical Communications Suite (Acrobat 3D 8,  
FrameMaker 8) and Windows XP. I've tried two different CAD formats:  
STEP and SLDPRT, both of which are supported by Acrobat 3D.

Any ideas?

As always, sincere thanks for your time and consideration.

    --D Reynolds