Hi everyone! I bought a used wah wah pedal, but it doesn't work. Of is a Crybaby gcb95. I place it in front of my amp. When i place it Between en turn in the amp, i get no sound at all. Only a loud hum. It does not make a diffrence if the pedal is on or off. Also have to push the pedal all way down to hit the on/off switch. I am not using it with a battery. I have it removed and use a 9v cable. Who can help me. I can solder if it must. Thanks!