How can I add hyphens to my website

Hi, I tried to add Hyphens to my Website, but it does not work. I added this code to the Additional CSS Section: body { -ms-hyphens: auto; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; } It seams working only the preview window while adding the code but not when I called the Website with my browser. Please give me an idea how to add hyphens to all sections of my Website. The URL is: http://sf-plochingen.schachvereine.de Regards Bernhard