Okay, I have never had an effect pedal before so bear with me. I simply plugged and played back in the day. Now I have a Digitech BSW. I want to be able to use it on demand with out unplugging anything. My amp has "pre out" and "amp in". I thought I can plug "pre out" into my BSW, exit thru the effect out and back into "amp in" and then plug my guitar into the amp's input jack and be able to switch in and out of the BSW effect. But that's not what's happening. If I turn the BSW off, I don't get sound. It's no different than just running the pedal in series between the guitar and the amp. So am I doing something wrong or is this just the way these things work? If the latter is the case, then how can I switch between a dry and processed signal? Do I have to buy an A/B switcher?