E_ADEPT_REQUEST_EXPIRED Error code

I keep getting this error code when trying to authorize my computer.  I am attempting to download a book from my local library, so I assume the time/date would be the same.  Is there any way to find out what time/date are on the download, so that I can make sure mine is the same??  I have tried changing my time zone several times to try to match up, but nothing is working.  Thanks in advance for any help.