bummed out, brand new MF Delay doesn't work.

Just got my minifooger MF-Delay and it doesn’t light up when I pop in a battery. It will pass audio through but none of the functionality makes any difference to the sound. Is it possible I’m doing something wrong here? I used the 9 volt battery that came with the unit and another brand new duracell from the store, but neither one light up the center diode. Anyone else have this problem?

the jacks are auto sensing and only power on when a cable is plugged in

Have you pushed the silver switch to turn it on?