Well, I do not use fakebook, so I do not know how their images are hosted. If they act as their own image host, as Christianchat used to, then it would seem you cannot take an image from there and try to make it display elsewhere, just as you could not take an image formerly hosted here and try to post it outside this site. The only time that would work, is if the image is hosted elsewhere to begin with, on a bona fide image hosting site like the ones I mentioned earlier.
Bottom line, whatever you are doing does not display images, as you are only posting links. I also am not very clear on how you are trying to copy them. Are you right clicking the image to get the url, or are you highlighting the image to copy it, and then trying to paste it here? That method does not use a url at all, though, meaning, you are simply copying the image, and bypassing the app. An image host still has that image somewhere.