Copy slide with background picture from another presentation

Hi

In one of my projects we have created a function where the user can copy selected slides from another presentation into the active presentation.

This works very well for all slides except when they hold a background image.
The background image doesn't follow to the target presentation.

This also happens if you manually open both presentations and use copy/paste. The background image is lost.

In our code we use the function activePresentation.Slides.InsertFromFile(<filename of other presentation>, index, fromSlide,  toSlide)

Is there a way to also copy the background image if one exist on the selected slide?

Best Regards Peter Karlström Midrange AB, Sweden