posting with pictures

[1985 kenworth]

maybe i am doing something wrong but whenever i post something and try to add an image the post goes through but no picture..what i do is type the text then click on add image and the box comes up for the url of the image i type it in and .its added to the post then i click submit thread the words come through but no picture i am trying to post 2 builds that i am currently doing with pics as i go along like i see others do..any help would be much appreciated