Edit: I figure it's most likely not such a trivial thing. So some more helpful ideas; Says on WoWWiki that if you've got Shift+*Button* bound already, then that will take precedence over the macro. For example, I tried your exact macro, and it didn't work, because I already had "Shift+1" on one of my bars (Incidentally, Shift +1 for me is HotR though ^^). Maybe that is of more help. I unbound my "Shift + 1" binding and then the macro worked for me at least.