Hi there ! I am still getting used to playing with this unit and I have encountered several problems, but nothing that couldn't be solved. This time I find myself in a bit of a loss....because in the HD 500 edit there is an amp model that when I choose, if I watch the pedal's led in the place where usually appears the amp's name, there's an X and I figured out that's because it doesn't recognize it. To be more specific, I am talking about the Plexi Lead 100 Brt. I have updated the unit and the issue still exists .... any ideas ? Thank you, Paul !