Sorry for not elaborating my problem clearly.
Before submitting this thread, I had read up the FAQ relating to this topic. I had tried using the "New Post" or "New Thread" page to try and insert a photo. But the problem is the button "Manage Attachments" did not appear.
I' using Safari (for Mac) and even when I used my PC IE or Firefox, its the same problem.
So I thought that maybe the problem lies in the "Positing Rules" at the end of each new post or replying page.
Can some one please advice me what went wrong ? Thanks.