Authorization is set for the device in Adobe Digital Editions, but the ereader says it is not authorized

When connected to Adobe Digital Editions (v3.0 and v4.5) the device options state that it is authorized, but when I disconnect the device from the computer, the device says it is NOT authorized. So, I can't read any of my books. This has been going on for three days now. This has happened since I got a new computer and tried to connect / download everything on the new computer. It was working fine for over a year on the old computer.