Troubleshoot displaying images in posts on Twenty Ten 1.2 by the WordPress team

I have all my pictures hosted on Flickr and i’m putting them in wordpress post with a simple HTML code provided by Flickr. They appear perfectly, but the problem is that in my worpress site I have post categories, when i click one of them, it display the post titles but the images are gone, i’m using Twenty Ten 1.2 by the WordPress team Theme. In other themes they appear perfectly, i don’t know if there’s a solution for that, the images appear normaly but when I click in some category they”re gone.
Hope someone can help ??

Sorry about my poor use of the English language