Like box of article with jooma content

Jim,
The first step is to install and enable the Open Graph - Content plugin that comes with JFBConnect. Once you install and publish that, it will help create a better title, description, and image for each of your articles.

Additionally, on each article, you can add the following tags to specifically set the Title, Description, and Image for that article:
{SCOpenGraph title=Title for Page}
{SCOpenGraph description=Description for your page}
{SCOpenGraph image=http://site.com/link-to-image.jpg}

There's more flexibility that can be done by going to the Open Graph tab and creating specific 'Objects' for each category, but that's probably not what you're looking for right now.

Finally, Facebook will 'see' changes in the Open Graph data every few days. You can force a refresh for a page by using their Debug Tool from the page below:
developers.facebook.com/tools/debug

Hope that helps get you going,
Alex

Jim,
Very sorry, I didn't notice I was posting in the Joomla 1.5 forums. The v4.3 release, which supports Open Graph plugins, will be available next week. Until then, most of the rest of what I mentioned above still applies.

Some things I see wrong:
* Delete everything in that Defaults box. Let's just not worry about those for now.
* The {SCOpenGraph ...} tags should be specified in the article text, if you want to use them. Looking at your page, I don't think you'll need to, so let's not worry about those for now either.

On your page, the Open Graph image tag is being specified as:
chasseautresor.cnes.cieletespace.fr/images/enigme.jpg
That image seems right for that page. If it's not, let us know. What I'd recommend is:
* Do what I mentioned above
* Go to the link below, which will re-scan your page and update Facebook's cache:
developers.facebook.com/tools/debug/og/o...enigmes%2F2-enigme-1

In there, you should see the title, image and description you're looking for and it shouldn't mention Joomla anywhere.

Hope that helps, but if not, just let us know and we'll gladly help investigate more.

Thanks,
Alex