Puzzling - so the images are there and you can mount them by double clicking - right.
No. The folders made with Windows 7 don't appear in the tree on the boot disk. Folders made with XP are visible, but will not open.
But how did this folder in which they are get created. Did you make this folder?
I made the folder before starting the backup image.
If not, create a folder on the external disk yourself and copy one of the images into it. Then see what happens.
I already tried making a new folder and moved a image file into it.
When I get a chance, I will create a new folder with Macrium and make a new image in that folder.