Hi Lionel,
you are right, as this topic is different to your issue. You could start a new topic on our forum with your problem.
I can see that you also contacted our support, so your issues will be solved there.
But as a quick hint for your problem, it helps when your components are georeferenced (then you can use Merge georeferenced components setting), when there is a good overlap (quite high for images and scans) or the most successful way is to use control points (placed on both components, minimally three control points placed on minimally three images/LSPs).