I recently downloaded some books from my local library which only use Adobe digital editions. I signed into digital editions with my Adobe ID, opened up the book and plugged in my e-reader to the computer. I selected from the drop-down menu over the e-reader to authorize the device and then copied the book to my e-reader. However, when I opened the book, it said that the e-reader was not authorized to open that product. I've tried several additional times to unauthorize and reauthorize the e-reader, but the book still will not read. Is there something I'm doing wrong?