Do you have icons above your quick reply box? If not you need to go to settings and make adjustments. The icons on the top of the text box allow you to click on the tiny tree (3rd icon from left) and follow the prompts. When starting a new thread, there is a little paper clip symbol in the icon strip above the text box. If you click on the paper clip it says "manage attachments" and you follow the directions. It is really simple from my iPad but I can't post pictures from my computer.