Those brackets around the img are very critical to UBB code. You need those like this [img] that's what performs the command.
But it is still not posting because the origin site won't let it. You need to put it on another server that you control access to. Or send it to one of the folcsite uploaders like me. Now we can't display that whole page. It's too big to fit on a post here, but we could post one strawberry.
The post was [img]
http://www.folcsite.com/misc/straw.jpeg [/img]. I had to add a space so the coding would show up.
Artemis