linked images, "most viewed", thumbnails show but not larger images

[sharpo]

The album contains one image, which I use for the album thumbnail, plus many other linked images from other albums. Thumbnails & larger images all show correctly, until "most viewed" is selected, the thumbnails all show but only the one image that is actually in the album can be viewed in a larger size. For all the others I get "selected file/album does not exist".

http://www.sharpos-world.co.uk/cpg/thumbnails.php?album=82

The above link will give you a page with the problem, the thumbnail without a title is the only one actually in that album, all the others are linked images. Everything will work perfectly until you select "most viewed", then the "selected file/album does not exist" message will appear when you click on any of the other thumbnails which have titles.