Putting a macro on a Device button is different than putting one on the Power buttons. Are you doing the following steps?
Press Audio and Mute together for 3 seconds. Once the display says SET, press the Device button you wish to set as Macro button. Then follow the regular macro steps to add commands and save. Make a delay the first step of the macro to have a push-and-hold macro.
Mike
www.SurfRemote.com