Ok! Hope you followed these steps,
Hit the 'Post Reply' button.
Type the content(text) that you want to post.
Scroll down to 'Browse' for 'Attach File:'
Find the pic on your drive, double click on it.
Hit 'Submit Reply', When the reply comes up, hit the Attachment.
As soon as the attachment loads, highlight its top bar(address)
Right click, and Copy it, close the window. -
$A
Click the Edit link in your post.
Now add this <img src=" "></img>, paste the Address of the attachment between the " and " , one that you've copied in step $A
Right click, and paste.
Submit changes.
BTW, donot worry hewee is here and he'll help you further and I'm sure it'll be done in a few minutes