I am taking an online class and bought the Ebook. It said to install it to my PC before my Nook. But now I can't get it to transfer to my Nook. I have Adobe Editions on my Nook because it comes with the device. When I hook up my Nook to my PC with the USB cord and open Adobe Editions, my device doesn't show up on the side bar to add the books to it. How do I get the books on my Nook?