Kindly please use daniweb facilities for attacments as images placed on external servers may get removed over time. To attach image you either have to be creating new post or be in Advance options for thread reply (Go Advanced). Bellow thread text area the are Aditional Options and one of them is Manage Attacments. By clicking on the button you open new window in pop-up and you can then add certain type of documents to your post