Hi Anand,
I suspect that this is about mixed content. By setting up SSL, you are basically trying to configure your site to only use HTTPS. The image link you used is HTTP, so I suspect it's not being rendered for that reason. Since this appears to be a link to an image from your same AtoM site, try fixing the URL to use HTTPS and see if that resolves the issue? Additionally, if you've configured a domain name for the site, then your link should probably use the proper base domain as well, rather than just the IP address.
Note, you may need to clear the application cache (php symfony cc, run from the AtoM root installation directory) and your web browser cache to see the changes.