I think it does, if in doubt refer to the help thread to learn how to do this properly (the forum is using conventional BB code, i.e. an img tag in square brackets, containing the URL and a corresponding closing tag in square brackets).
Do make sure you're using the direct url of the image, not the url to some page embedding the image. Please post your url if you're unsure whether you've got it correct.
Right, that's an internet page with the image embedded instead of the actual image. You can find the direct URL of the image under your right mouselick.
For future reference, if you're using Chrome you can also just right click any image you see and "Copy Image Location" or "Copy Image URL" and it'll always give you the direct image URL in just 2 clicks