I have owned a Bosch dishwasher for many years. I have always loved it. We decided to go to stainless steel appliances, so I bought the latest Bosch dishwasher with a pocket handle and controls that are not seen when  door is shut.   My problem is getting the machine to run. I press the on/off button, pick my cycle, pick an option and hit the start button.  Shut the door, check 1/2 hour later & machine has not come on.   I can do this several times, but still the machine does not start up.  Not sure what I am doing wrong .  Can anyone help me?