The link you posted is a "folder" of images... Won't work unless you specify a particular image from within that folder, folders won't post...
Utilizing a single picture from within your folder:
I used this image (http://cid-f7ae3cc2508e65a5.photos.l...ance%20014.JPG
This yields a "red X
" image place holder...usually the result of an image being "out of range" size wise (pixel size) or data volume wise (KB). I looked at the images in the folder (you did say it was public
) and they are posting as being 1600x1200 pixels and 320+ kb...most forums/blogs like images to be less than 500x320 pixels and in the region of 24-120 kb max. I don't know what the specs for this forum is, but, here is a picture of mine:
It is 500x320 and 48 kb
Maybe try resizing the images and see if they will post then...