Hello, maybe can I help you. First of all, download my map editor_test. Maybe your files are corrupted.
Download it here (http://www.mediafire.com/download/dblyhcqv9o0ocab/editor_test.rar)
If this doesn't fix it, check if your map have this options checked:
(Contains images)
(http://i.imgur.com/ncAK7n4.jpg?1)
(http://i.imgur.com/aYjNeZ9.jpg?1)