Where do you want it to show ?
What you copied is html code.
If you want to display it in this forum (for example) you need to modify it to bbcode.
Your card would be :
http://static1.scirra.net/arcade/games/1043/card-long.png[/ img][ /url]
(without any spaces, remove them first)
Tom should add a "bbcode" field in the arcade at some point, I think it is on its todo-list.