How to add image in product description?

I am trying to reach people by showing my related product in the product description. Thought it would be better if I attach one or two image and create a link to that product. Recently I tried to do this on one of my products…

The problem I am having, when I view this product it shows no image at all. Did I do something wrong? And I uploaded those images to is there any default way to do that?

It seems imgur may have banned graphicriver (probably due to too much traffic). Best to find an alternative image host.

Thanks for your info.