Try this. In signal flow view, you set the switch for the wah to Exp 1. Press the > button to access the additional setting for Exp 1 and set it to something like 3-5%. Then rock it to heal down and make sure the effect is off. Then rock it forward and make sure the effect is on. If not, press the foot switch to activate the state the effect should be in. The pedal effect should come on once you rock it past that threshold. Hope that helps. I sometimes run into the same issue and then I'm like "oh yeah."
