Xara :: Copy / Paste Original Images And Converting To Reflections By Using Transparency Tool?

I am having problems trying to produce an image with reflections. I have been doing it in the past with Xara4. My procedure is to take a number of images, create copies of them, flip them then add transparency once they are in place as refelctions. These are all placed onto a dark background; reflections are stretching beyond the background at this stage. And in the past if I select all, then Arrange>Combine Shapes>Intersect Shapes then I can have the whole image without the transparent regions of the reflections. My plan is to have the background transparent and save all as a png to preserve the transparency on web. But it doesn't seem to happen in my latest attempts. Instead at the Intersect Shapes stage I get a tiny part of the background as my final image....