I see that you are still running JFBConnect 6.2.2. The first thing that I would recommend is that you upgrade to our latest JFBConnect v6.2.3. There was a known bug in 6.2.2 directly related to setting the Open Graph tags (like image and description).
After upgrading, please manually re-scrape the page you're testing with the Facebook Open Graph Debugger (
developers.facebook.com/tools/debug/) or our site (
socialdebug.com). After re-scraping, please retry the Share Preview on that page to see if that helps.
If you're still having issues after the upgrade, let me know and we can help you investigate further.
Thanks
-Melissa