I am sorry to trouble you, but can you help me. I download a book title from Waterstone and it appears in Adobe Digital Editions OK. You can read it OK. I then drag the "picture" of the book in Library view onto the 511EB device in the left hand side. It displays 3 options and I select Replace Book. Then it says Product Authorisation and then the book is transferred. I then select "3 Digital Editions" and "3 The Pacific" but it then displays a Note screen with the message "No valid lisence for the book" (Their spelling!). If you do not have this trouble do you mind letting me have all your settings and anything that may help me.