Passenger door locked cannot open. How to fix this problem?

Still under warranty? Might be.NOT COVERED? Then try this.......Roll down the window,tap the door at the rear edge of the door halfway up the door with a rubber hammer,not enough to dent the door but almost.While tapping firmly with the rubber hammer try locking and unlocking the door with the inside lock button.The tapping (8 out of 10 times) will jiggle the door locking mechanism just enough to allow the lock to disengage inside the door and VOLA the door opens.DO NOT LOCK IT AGAIN UNTIL IT IS FIXED.