Exporting shapes with images

["Marshall, Steven J." <Steven Marshall jhuapl edu>]

I have a project that requires us to be able to make diagrams out of
pre-defined images, and was hoping to use dia to accomplish this task, as
our group has used dia for uml diagramming in the past. It would be nice to
be able to make a sheet out of these images, so it would be easy for others
to accomplish this. However, my attempts to export shapes with images in
them and then make a sheet out of these shapes have failed thus far: lines
and other SVGs show up fine, the image is displayed in the .png icon, the
svg part of the shape has an xlink:href to the image, but the images are
non-existant when the shape is placed into a diagram. Is there something
else I should be doing? 
        Thanks,
                Steve