Background image just won't change

Hi everyone

Here need help with my background image.

My website is www. swimbikerun .ph

I was already able to change the background image of my forum

www. swimbikerun. ph/smf/index.php

But for some reason, it just refuses to change on my wordpress site.

Here is the code under the stylesheet

body
{
        background: #000000 url('https://www.swimbikerun.ph/wp-content/uploads/2014/09/adidasbg2014new.jpg') center;
        background-repeat:no-repeat;
        background-attachment:fixed;
        font: 78%/130% "Verdana", "Arial", "Helvetica", sans-serif;
        margin: 0 auto;
        padding: 15px 0;
}

I also turned off the cache and tried reloading multiple times as well as cleared my browser but it’s still not working.

In the forum it worked right away. After I changed the image location to the new one.

Hope you guys can help me. Already at wits end coz of this.

Seems like so simple but it doesn’t want to work.