With my ipad i have the same problem... The leds are all off when i load a new rig. There are some stomps active. Depending on the status it works or not. Switching on is always right. The status is off and i switch it on. Indicator on the pad and stomps on the kpa working well. Wehen i have the stomp in on status the first klik is on, nothing happens except the led indicator turns on on the ipad (even on the HD500) and the second click switch it off again. It i s not a big problem if the kpa is in visible distance in the rehersals or at home.... Later on stage it is worst to control the kpa without the actual status of the stomps.
Again and again and again!!!! Christoph Kemper has to launch immediately a floorboard integrated into the kpa. In my opinion the kpa users invest less time to find and profile nice tones as in having the rig working for live gigs... Look into the forum. The negativethreads are much more than the positive and optimizing ones. Thats a shame... This can't be the inventors understanding of being a "Kemperian"...