How do you pass stage 12 on Monkey GO Happy 3?

you press the poster until you see the clown poster. then you go to the third drawer and connect the cord to the phone and type in 080025696 and then it will ring. then you go to the second drawer and you will find the key. then you bring the key to the doorknob and press down. the when you are done you hit the door knob again and you are done.