The Action you're attempting to use is deprecated, and is no longer support - Both the text at the top of the Action, as well as the Wiki page, state this.

As of ISBoxer 38, WoW Macros should be kept in the World of Warcraft Macro Library and used via Named World of Warcraft Macro Action. It is recommended that you use the new system instead of using the original WoW Macro Action; the new system is less confusing!