transferring book question for prs-600
I have a strange problem with my reader. I downloaded a couple books and they downloaded with no problem. I can view them on the computer using my reader software. When I transfer the books from "library" to "reader" it shows that they have successfully transferred. When I go into my actual reader, the books show in my list of books, but when I try to open them it says "page protected" and they won't open. Any suggestions? I called Sony out of desperation and they said to delete the file off the computer and the reader, re-download the files. I tried that and it still won't work. What is really frustrating is that I can view the files on my computer with no problem, but when they transfer they don't work...