I plugged my new sustain pedal into my keyboard and then plugged it into the outlet, but it wouldn't turn on. When I unplugged it from the outlet, it worked fine, sustain pedal and all. However, when I tried to plug it in after having turned it on, it turned off. I'm not sure what to make of this and it seems extremely strange. D: Can I have some help?

Music - Yamaha - Portable Keyboard