#1, be sure that your pictures are 640x480 pixels. Check and change your camera settings. Large photos will not load to QB.
#2, note the square little box on upper right with the small tree when you post to a thread or make a reply. Click on it to insert a picture.
#3, you can also go to "Go Advanced) and move down to "Manage attachments".
#4, when all is lost, go to the search/help section at the top right of the thread and search for photo posting or something similar.
It won't be long before you will become a QB pro!