I have a Miele Knock to open dishwasher which had our old Miele dishwasher stainless door on it until we had our cabinet panel door made. After we installed the panel, the dishwasher OK button won't function. All other controls work except for the OK button. We also did a test with the old door and all functions work and the dishwasher operates. I checked Miele documentation and there is no information on this issue. Any ideas why this is happening?