Push the button in further, until it clicks and then release it. The button should pop back out. Then pull the orange ring that is on the outside of the knob and turn the knob it should now work.
Thanks Bob ! That did the trick- I was getting over anxious thinking I had bought a machine with a problem. Thanks so much for quick response !!!Push the button in further, until it clicks and then release it. The button should pop back out. Then pull the orange ring that is on the outside of the knob and turn the knob it should now work.