I have Adobe Digital Editions 4.5 downloaded on my PC. However, when I want to download an EPUB ebook from my public library's sight, ADE comes up with the message, "Error! Check Activation." I have tried to deactivate the ID (with hopes of then reactivating it and maybe it working) but it won't even let me do that. It then comes up with the message, "Unable to erase authorization. Try after sometime" I waited about 2 weeks and tried again and it still doesn't work. This is really frustrating me because all I want to do is read books on my new eReader. Could you please help me with this? I have already spent way too much time on this. Thank you.