Header image wont show

Hello
I modified the header.jpg picture of the sport theme and uploaded it. When I go to the website I can see the header image showing. However, none of my friends can see it when they visit. They just get the normal blue background. It doesn't work on my iphone, but on the laptop I can see the picture.

Thanks in advance

Hi!
Probably, your friends visited site before, and previous header image saved in the cache of browser. In this case they should upldate page using CTRL+F5 in a browser. Could you give us URL of your website, so we can find the exact reason?

No, it is not due to that. They did not visit the website before AFTER I made the changes. The website is ilfantasista.com