Kobo Glo thinks it not authorized

I am unable to use my kobo glo.  I keep getting a message on my ereader stating the device is not authorized.  I have uninstalled and reinstalled adobe digital editions 4.5.  I have erased the authorization for my laptop and then reauthorized the computer.  I have done the same with the ereader.    On my laptop, the adobe digital edition screen states the ereader is authorized, but the ereader says it is not authorized.  Please help.