I recently got a Berhinger Ultrabass120 watt amp and it comes with an effects loop in the back. The problem that I have is that I'm not entirely sure on how to use it. I have six (6) pedals and when I tried to plug them into the back, no sound was coming out. So I looked in the instructions and I had them in the right jacks but still nothing. Then I switched them but still nothing. If anyone could help me out with this problem that I have it would be greatly appreciated, thanx. Peace!