I an not implying your are an idiot. Just trying to help.
When troubling shouting I start with the simple things first. Many users think the sound should come from their computer speakers.
Also, based on your original post, there is know way of knowing technical level with copumters or recording gear.
Just for clarification, when running the newest version of Monkey, do you have green ticks for drivers/firmware, ect...
Thereare 2 ways to select the input. In Pod Farm or in the Line6 Audio-MIDI device control panel.
In POD Farm, in the mixer view there is a drop down to toggle between Instrument and Mic, I would check there. BTW, if you already know this, I am by no means implying your are an idiot.