The back door to go from ADE to Sony Reader PSR-T1
Download book to Digital Editions, close it. Go to My Documents, to My Digital Editions folder--open it. Pick the file of the book you want on your Reader and right click on it--go to open with--choose Reader for PC. The book should open in Reader for PC (you will need to log in)-- click the back arrow. You should be on the home page and the book should show in My Library. Transfer from Reader for PC to the Reader as usual.
I hope this will help you.