You have to post the image using the tags I used below ...the img and /img tags at the start and end of the image address.
[noparse]
[/noparse]
Problem with SOME image addresses, like the one above is that a site will do things to make it harder or impossible to hot link. By hot link it means they keep the image on their site and someone comes along and copies that image address to use on another site. By doing this the bandwith being used is pushed onto the site who is hosting the image and is not considered good net etiquette to do.
The best way to do this is to find an image you like. Download it to your computer.
Find a free image hosting site like photobucket or imageshak.
Upload the image and then use that address to copy and paste.
For example...
I downloaded the picture from the address above.
I went to http://*************/ and uploaded the picture.
Once the picture is uploaded to that site, I copy and paste the address into tags like this...
[noparse]http://img67.*************/img67/2143/4215864490oo0.jpg[/noparse]
which should give you this...
http://img67.*************/img67/2143/4215864490oo0.jpg
Hope that helps.