Hi, We are currently investigating the issue at our end with ADE 4.5 with Kobo device and once we have any update then I will definitely share it with you. Also, I would like to share few points given below that you should verify at your end while working with ADE 4.5 and Kobo device- Make sure that the ereader and ADE are both signed in using the same account. For Windows You may also try to de-authorize ADE by opening registry editor and navigate to "HKEY_CURRENT_USER\Software\Adobe\Adept" Right click the Adept key and choose Delete. For Mac OS, click on Finder and navigate to Go > Go to Folder and type ~/Library/Application Support/Adobe/Digital Editions Drag the activation.dat file to the trash. Relaunch ADE and it will prompt you to sign in with your email address again. Once ADE authorized, try to check the issue again. Also try to de-authorize and reauthorize ADE on your device as well and then check the issue. Try to check with sample eBooks whether you are able to read them on your device. Sample eBooks can be download from- Sample eBook Library | Adobe Digital Editions If the above mentioned steps doesn't work, try to perform the below steps and see if that helps- Try to download ADE 3.0 (http://www.adobe.com/support/digitaleditions/downloads.html) De-authorize the ADE on your machine (Windows/Mac) using the instructions mentioned above. Get a book from the library book When prompted, open using ADE (or download- I just said open instead of download) When you try to open the book in ADE, it'll ask you to authorize computer Do the authorization (the same as my Kobo) then transferred the book to your Kobo and see if that helps. Regards, Ajit
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