Facebook share image sharethis

In my site I add sharethis plugin to share pages

My problem is to manage the image in sharing page, and seems that facebook take the first image and not my image.

this is my page http://www.netafim.com/testimonial/netafim-customers-video-testimonial---uvs-south-africa

In this page i have this meta tag

<meta property="og:image" content="http://www.netafim.com/Data/Uploads/South Africa_sugarcane_share.png"/>

this is my image in the meta tag

But when sharing i see another image

[ enter image description here ]

Why and how can i manage my sharing image?

thanks

Solution

FIX: Rename the image filename without any whitespace characters(ie. space in filename)

So far, all it could scrape is just the title and description of it. And since it can't scrape the image(due to the space in the image filename), it has fallen back to the default image for your website, which is

Hope this helps. :)