Desktop layout breaks on Iphone

Hi,

I got a big problem with the template on Iphone, desktop view.
The layout is broken and the background is showed only on half of the page.
Please find attached below a screen capture. Thanks.

My website : http://www.tiwisport.com/profil/128-thomas-darras

photo.jpg

In the responsive.css after line:

@media screen and (max-width: 960px) {

please add following lines:

body {
min-width: 760px;
}

Thanks !