Is this something to do with the other background images not loading? That was the only thing I could find.
I'll need more details on this to fix - but you should look at each .css file and either name your images the same - or change the image name in the .css to match your actual image.
lemourillon.free.fr/templates/
transparen...iss_1.5/css/img3.css
Was you image named: image3.jpg
Hope this might help :unsure: but then again maybe your question is something completely different... Wish I understood French!