Buttons stop working at low resolution monitors

Hello, I have been working on this photography website, N its a full screen flash website showcasing photography. At large screen resolutions the buttons work fine, but when the resolution is lowered to a 1024 * 768 or something similar some buttons work and others don’t. Does Anyone have any ideas about this issue. The best example of this is on the travel page. Please if anyone can help that would be great. It seems to be some resizing issue