G-force Tap Tempo

[bettsaj]

I have a TC Electronic G-Force multi- effects processor, I want to use a simple tap tempo pedal plugged into the control jack on the back of the unit. I built a simple tap tempo pedal using a momentary Normally open SPST switch. I simply soldered the terminals of the switch to the terminals of the jack socket. However it doesn't work. I'm getting a a signal to the G-Force but it's not making any changes to the tempo. When I click the pedal, i get the pedal light flash on the G-Force but the signal seems to stop there.

I've ensured the G-Force is recognising the pedal which it does when I set the G-force to "learn" mode.... I press the pedal and it stores the pedal.

Is there something I'm missing here? What I have noticed is that I get the light on the G-Force light up when i press the button and also when i depress the button on the pedal, like it's bouncing.

I checked everything by setting up one of the buttons on my ground control to change the tempo and it worked a charm.