problem displaying images

[Fred Chauvin]

Hello,

Sorry for my English!

Here is a problem I have for several months,
I wanted to put new pictures to illustrate my products.
 
So I was on the plug of my product, in the image tab, and then I added an image (within the size and format).
I can see the image appear on the side of the back office.
 
On the website I see a new location appeared but I never see the picture I previously loaded!
I regenerated thumbnails, nothing has changed!

on my FTP, I can not find the path of my images is indicated in firefox.
For information, I am under prestashop 1.5.6.0.

here is a further explanation of my problem.

Ex: I have an image that was renomé 175.jpg,
in my naviguator the address is: http://www.camboxisis.fr/shop/175-zoom/cambox-isis-noire.jpg
I find thumbnails in a folder in www / shop / img / p / 1/7/5 with all thumbnails in this folder.
This image appears well on my site.

For the same product, I added a new image, she was renowned 10-460.jpg
in my naviguator the address is: http://www.camboxisis.fr/shop/10-460-zoom/cambox-isis-noire.jpg
I find thumbnails in www / shop / img / p / but it does not appear on my website.

I do not understand why it has changed!

Does anyone has an explanation? how to update my products in another way?

thank you