Check while you are inserting the image that "Store only a reference to the file" is unchecked. This will then store the image on the layout, instead of a reference to the image which if on your machine no one else will be able to see.
This has cough me out a few times recently.
I think I now remember someone telling me about that checkbox a long time ago in a galaxy far far away....
Many thanks! I had completely forgotten about that.
No worries Kurt, like I said it has caught me out a few times recently.
I am not sure but think this may have changed to be the default setting in 9, where as in previous versions it would always insert the image by default. I could be wrong.