ACSM uploaded to ADE, but won't upload to the connected e-reader.

Dear,

ACSM uploaded to ADE, but won't upload to the connected e-reader. It gives an error saying that I do not have the permission to copy this book. I just bought this book, so I should have the rights to upload it to my e-reader. I was able to transfer a previous book. 

Kind regards, 
Annemarie