geez.. i had the very same problem with another model, but after several intents i never made the effect to work.
i asked for help in this post
viewtopic.php?f=7&t=1956In the end i gave up and deduced that the effect is only possible in cataclysm....
however, if you find out how to make the effect, please share it, and i will make you an statue
regards and good luck