Had this problem yesterday....were you able to figure this out?
I had recently updated from Windows 7 to Windows 8.1 and thus had to re download Adobe Digital Editions. I downloaded Version 4.0 but the problem seemed to be with the authorization between the e-reader and the computer. While in ADE click the help button and click erase authorization then re do your user id and password. It worked for me.
Tk u. Will give it a shot.
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