Found our old phone while cleaning out closet. Plugged in and all functions work, however, it's flashing "2" and then a "CL" code back and forth. I am pretty sure there is a message saved on here by my Father, who passed away 7 1/2 years ago, so I'd like to be able to save if possible. How can I get the messages to play, and get the "CL" code to go away? Help please.