You're doing everything right, but you have the wrong link to the picture is all. The [IMG] tag requires a direct link to a photo. Take the
link you posted above and open it, notice that below the picture there are a couple of links in the section titled "Additional Info". Copy the one next to "
UBBCode:" (use the copy to clipboard button if you please). Paste that into your post and you're set to go:
If you already have a direct link to the image, just surround the URL with the [IMG][/IMG] tags.