I know the secret that CASIO is hiding behind this thing. If your watch shows "OPEN" then you don't have to go to a CASIO retail store. You don't have to send your watch with money to CASIO or go to an Authorized CASIO Service Center. I know how. Just send me an e-mail to s.duteau@videotron.ca and believe me you'll be happy to know the "SECRET" an get rid of this annoying "OPEN" over with. You want this fix! Than don't wait.