Thumbnails in posts

I upload an image with the inline uploader, and drag the pic over to the editor. The radiobutton is checked on “Link to file”. When I then click the thumbnail in the published post, I get redirected to the URL “http://www.mypage.com/wp-admin/upload.php?style=inline&tab=browse-all&post_id=283&_wpnonce=c03cc8b9ed&ID=285&action=view&paged”. I want the thumbnail to link to the file itself, so that the image itself is shown. Isn’t this what the “Link to file” is supposed to take care of? What’s wrong?