I purchased a book in 2008 -- 4 PCs and 3 ISPs ago. On my last computer, I just double-clicked the title, and it loaded Digital Editions and opened. Now it asks me to sign in, but says the book is not associated with my account. Solution anyone? This wouldn't be such a big deal, but this is a $150 book, I bought it, and I want to look something up in it.