If you hover your mouse over the button and poise your finger ready to click but don't actually click then nothing will happen all night long. Treat it with care.
Oh with the utmost care after the experience I had with it. Would you believe I did that already, kept my finger poised over the button all night and just as you say it did absolutely nothing. A VERY sensitive button indeed. But at exactly .08 seconds after sunrise a ray of sunlight struck the button and the entire EvC screen lit up with bursting psychedelic patterns and colors. It was absolutely gorgeous. It lasted exactly .5 seconds. But I was blinded for the next hour. I do not recommend experimenting with this button.