When I first turn on my Spider Valve mkII, the pedal on my shortboard works fine (as a wah, pitch glide etc.) However after about an hour of switching channels and banks, I go to use the pedal and there is no wah sound and there is no pitch glide effect for either of their respective presets. I have to turn off the amp and turn it on again to make the pedal work. I always press really hard till it clicks (I actually like that feature) and the Shortboard is calibrated. By the way, I have switched around many presets to different locations on the amp and the software is 1.17. Any thoughts as to why the pedal's functions stop working after a while?