Hi, is it correct that the light on the ampli related to the effects loop remains always on with the pedal-90012 connected?
Additionally Lights on the pedal do not switch on, is it correct?
One button on the pedal will allow you to select between Clean or Crunch on one channel and OD1/OD2 on the other channel depending on what you have selected on the front panel, the corresponding LED on the front panel will be illuminated. The other button switches the effects loop on or off, the LED on the footswitch should be illuminated when the effects loop has been selected, as should the LED on the front panel.
If this is not happening you may have a fault and we would recommend that you take it back to the dealer you purchased it through.