I have updated the firmware 2.0 for DT50 and installled the controll app on my Ipad. I am now able to modify the pre amp, cabs and reverb on my DT50. It works perfectly on channel A. But on Channel B I can only select the pre-amp. It does not react to cab, reverb or mic selection at all. I have the same problem on my DT25. Has anyone experienced the same. And more importantlynis there a solution?