Had a few ask so Ill explain when you post an image what you do is you
a) Start by hosting the image (its the button with the image overlaid by the disk (a free hostiong site
www.servimage.com or something will pop up u can host here for free)
b) select & upload your image
c) back inthe text box hit the insert image button and when you put in the link you need to put in the link as it shows on the server site for the full sized image