daryl66, you do know you have to add the image tag, right? That is done by clicking on the little tree icon right above the reply box (not the Quick Reply box, the standard reply box).
As for the Flickr images, right-click (or control + click) on the image you want to insert in your post and choose Open Image in New Window, you should get the image URL that ends with either .jpg, .gif or .png, depending on the image file format you have on that Flickr page of yours. That is the URL you have to put in the image tags. It can't end by any other letters than .jpg, .gif or .png if you want it to show up in a post or a webpage.