Adobe Digital Editions not working on windows laptop but is working on Iphone

I purchased a book from Rowman & Littlefield that was required for a university class, there instruction were pretty straight forward and told me to download Adobe Digital Editions. I downloaded my ebook and see it in Adobe Digital Editions, when i open i see the coverpage, copyrights, table of contents and Introduction but then i can navigate to the rest of the book. I can read the book on my phone but not my computer, its the same app but i dont understand why its not on my pc.

Does anyoen know why I can access the book on my phone and not my laptop?