CKfinder popup image properties Red Cross

Hi,
Every thing went well in localhost but since
I am working on line, trying to put pictures on my web site using CKfinder, nothing goes well.
I manage to up load pictures in the folder images but once selected the picture turns into a white cross on red background.
Have you an idea of what is going wrong ? A bit of help will be welcome I found no answer on the web.

Thanks