Thumbnail linking to image file vs. singel page.

I’m sort of new to wordpress, and I haven’t been able to figure this one out.

I’m creating a single page, using it as a gallery, so I create the page, upload all the images through the inline uploader, replace the WP-made thumbnails with some I’ve made myself, and I’m ready to go.

I then use the single-page editor to put the thumbnail on the single page, and here is the problem, if i put them on the single page as “thumbnail > image” so that there is a thumbnail linking directly to the image file, there is no problem.

If i put the images on the single page as “thumbnail > page”, so that the thumbs on the gallery page links to single pages with the full size image, and the possibility to comment on the images, then when I log out, go to the gallery and click a thumbnail, it tays “sorry, nothing matches your criteria”.

I am completely dumbounded by this, so any help would be appreciated.