When I try to download an ebook from the library, I receive this message, " Adobe cannot open (name of book) because it either is not a suppported file type or file has been damaged. I spoke to an Adobe tech and he said it was a problem from book supplier ( the library ) not Adobe. He suggested I try another library system. I did but I still received the same message. I have downloaded Digital Editions several times and deleted it and reinstalled it but to no avail? Any suggestions?