Won't stop running in auto mode

This is an issue with the paper feed sensor if it is mechanical switch there may be paper holding switch in active position if it is a elecronic sensor (looks like the bulb on the end of a remote located in the center on both sides of the paper slot) it may simply need to be cleaned with a Q-tip dipped in rubbing alcohol. If cleaning or unsticking switch does not work you will have to contact the manufacturer for any parts replacement.