Basically I'd like to know how to work a footswitch. I don't believe I have an instruction manual because I bought the floor model, and I seriously cannot figure this thing out.

It has to be something basic, I don't understand why it's not letting me swap channels, isnt that what a footswitch is used for. Amp is Crate Gtd65 http://www.guitarcenter.com/Crate-GTD65-Guitar-Amplifier-104203864-i1171326.gc?full_sku=104203864&urx=1
thanks for help.

Also I plugged my headphones into the cd input and they acted like a microphone, weird.