Reply to Unable to put S4 in MIDI mode--help?

I'm trying to do so in order to manually map the S4 for use in ableton, and i can't even get the first step down--putting it into MIDI mode itself. I understand you have to put it in MIDI by pressing the SHIFT+Browse buttons on the S4, and the message ON should display in the loop recorder to show it's in MIDI mode--i press shift/browse and it does nothing. Any ideas why i'm an idiot?