I've recently down loaded 4 books from the ebook library store. When I plug my ebook into the laptop, as I've done for 50+ previous books ordered, it says on the book's screen that I've got a USB connection. Unfortunately, on the library screen on the left side of the page on the laptop, it doesn't show the ebook, so I can't down load the new books from the purchased section of the library into the reader. I've tried rebooting the laptop and waiting 15 minutes and re-connecting the USB cable. No luck. I've got 50+ books on the reader, all down loaded over this USB cable. Any suggestions?