Nope, guess you have to officially label me as technically-challenged on this occasion.
No! No! Don't give up. It must be me not explaining properly. Let me try again:
Step 1. If you are not clicking on the "quote" button to start your response, then click on the "Advanced" button.
Step 2. Click on the "Paperclip" icon on the Menu Bar at the top -- under "Message:" (to the left of the smiley face).
Step 3. In the new window (that opened when you clicked the Paperclip)click on "Browse." In the new window (looks like "My Computer"), go to where your file is located and highlight the file name. Click on "Open." Click on "Upload."
Step 4. A new section will show up entitled "Current Attachments." When your file is listed there, close the window.
Step 5. Go back to your post, place your cursor where you want the image (attachment) to appear. Click on the "Paperclip" icon again. Your file will be listed. Simply click on it.
Step 6. Click on "Submit Reply," stand back and admire your handiwork.
You may want to print this out before you start. When you are done, let me know what happened so I can adjust my instructions.