Hayudog, you messed it up!!!
First you have to put a img in front of the url for the picture. Next you have to put a [/img] after the picture's url.
However, on Imgur if you pull up the picture it gives you several ways to share, including forums or message boards. If you click on that it copies the img's for you automatically. Then you just paste it into the post.
Sent from deep in the woods where the critters roam.