I just purchased a vintage pedal that was used in combination with the lighted footswitch for the K-250 heads. I plugged it in and nothing. I'm having issues with my 2nd channel on both amp heads so I was wondering if the pedal only worked on the second channel and not the first. Other than the fuzz effect, all the functions work on channel one. Do you have to have the lighted footswitch as well to make this wah wah effect work or did I get a defunct pedal?