All well. You may see it working exactly the reverse of its functionality - it sustains when the pedal is released. To fix this, just unplug the pedal, switch off the keyboard, plug the pedal back in and switch the keyboard on.
It's flimsy and has a very small travel distance, considering that i have long and heavy legs...It's a pain to have to make such fine movements...And it isnt worth the price...i suggest you go for the M-Audio sustain pedal which actually sustains the sound as much as you want. This is nothing but a switch, a very bad one at that