Is there a reason my Volume and Wah expression pedal on the HD-300 have no effect when L6'd to my DT-25? Is there a work around, some fine print in a secret code? The wah just gives a slight tonal change at each end of the sweep,Volume pedal does nothing, Pitch glides sound like it's just modulating in and out of tune. Is my new toy broken, or, is this a ,not so subtle, design flaw? Please tell me my logic is flawed, that I have mistoggeled a switch, foolishly missed a critical clue... then teach me the Way of the Wah.