I can see the photo by clicking on the link.
However — Once you've uploaded the photo to PostImage, select the picture and then, at the top of the screen, click on 'share'. You'll see a list of things, one of which is "Hotlink for Forums". Click on the icon to the right of that and the link will be copied. Go to your post on this forum and paste in the link you just copied. It should then bring up the picture itself. In this forum, you'll need to click on the 'More Options' button, and then click on 'Preview' to actually see how your post will look.