ok. i finally figured out how to look at the embed code. here's your problem. thats a disgustingly badly formatted embed code that uses a feature that doesnt work on these forums (putting a link on the image)
anyway. I copy and pasted it and then highlighted the ONLY part of the embed code that you need. everything else is pointless
if you dont want to have to delete the extra code every time, I would use a different image host. flickr seems needlessly complicated and it also looks more like a photography website and shouldnt be used as an image host anyway