Bad link to image

HI!
The link to the image doesn’t show the image.
Here is the code of my FB page :
<img class="img" alt="" src="https://fbexternal-a.akamaihd.net/safe_image.php?d=AQBK99mVA…2Fuploads%2F2013%2F04%2Fmotocyclette_convertible-255x300.jpg"></img>
Only the end is OK “motocyclette_convertible-255×300.jpg”
The exact URL of the image is "http://www.selleriemoto.com/wp-content/uploads/2013/04/motocyclette_convertible.jpg"

In the settings I choosed “Featured post image”
What is wrong with my settings?

https://wordpress.org/plugins/add-link-to-facebook/