zencart 1.5.1 when i puplish on fb I don't see miniature image

I am looking for a developer who can help me fix an issue with my zencart 1.5.1 website. When I publish a product on Facebook, I am not able to see the miniature image.

Example

When i click publish on fb I see image
https://www.micropdr.com/negozio/index.php?main_page=product_info&cPath=73&products_id=218#.ZGgt36VByUk


When i click publish on fb I don't see image
https://www.micropdr.com/negozio/index.php?main_page=product_info&cPath=82&products_id=217#.ZGgjq6VByUk

Requirements:
- Experience with zencart 1.5.1
- Knowledge of Facebook Open Graph metadata
- Familiarity with Facebook's debugger tool

Tasks:
- Troubleshoot the issue with miniature images not appearing on Facebook
- Ensure that the website's Open Graph metadata is set up correctly
- Test the website using Facebook's debugger tool to ensure that the issue has been resolved

If you have experience with zencart, Facebook Open Graph, and debugging tools, please submit a proposal for this project.