when you are going to reply- send a message there are 3 options---Post Quick Reply; Go Advanced & Cancel
if you click on go advanced a new page comes up with options- click on 'manage attachments'
then a box comes up that you can click 'browse'
locate your picture= click on it- then choose upload- a message across the bottom will say----uploading photo- please wait-
when it is finished you can close that box= then click 'submit reply' and the picture & your message will post.