Why the image disappear when participating in the Facebook note builder you select the link to the image through Meta Code

when i share a link from my website on facebook , i don't find Image which i selected to desperate to other users

<meta property="og:image:height" content="240">
<meta property="og:image:width" content="440">
<meta property="og:image" content="http://ift.tt/1bEOaWf" />