Oh right, my bad, I didn't notice that you're using an imgur album link and not a direct image link. When you have your image opened on imgur you have to hover your mouse over the image and click 'Copy' (or, alternatively, rightclick the image and click 'copy image link'). That's a direct link to your image and that's what should be pasted between the img tags.
Upload it on imgur, hover ur mouse over to the right top part of the image. Put it on the arrow and then click on the option get share link. Choose the one that includes Forum URL (BBCodes) 3rd one I think. It should give u a link like