Unfortunately, this 'ereader' stuff is more than plug-and-play. It starts
with techy stuff and then continues with some more techy stuff until you're
reading the ebook. The message you're getting tells me that something is
messed up in the installation of either your ereader or your copy of ADE.
You didn't tell us what kind of ereader you're using or your computer type
and operating system. I can't 'assume' what ereader your have, but let me
'assume' that you've got a PC running Windows 7. Here goes....
If the ereader isn't registered, Adobe may generate the message you're
getting. You should make sure that your ereader has been registered with
its website. For simplicity, use the same ID and password for this as you
used to register with Adobe when you downloaded and installed ADE.
Sometimes when you do this, the ereader website updates the software
located on the ereader (not ADE - that's on your computer). And some of
these updates cause problems later on.
Once you have done the registration bit, you 'should' be ready to download
ebooks to your computer via ADE, and then transfer them to your ereader.
You go to the ebook website and follow their directions for downloading.
During that process, the website should activate ADE on your computer
automagically, and then you'll be asked what to do with the ebook: 'open'
it or 'save' it. I suggest saving it. If you choose 'open', the ebook
will be downloaded, but ADE will open it to read on your computer, and the
ebook won't appear in your library. If you choose 'save', then the ebook
will be saved and entered in your ADE library. That's the basic process.
Using the ereader isn't supposed to be hard either. You would plug it into
your computer and make sure that the computer 'sees' it attached. The
ereader should have a drive letter if you display your computer's
information using My Computer or Windows Explorer (NOT Internet Explorer),
and the ereader should display a message saying that it's connected to the
computer. After this is done, you can start ADE. During its startup
process, ADE will look for attached ereaders, and when it is finished
starting up, it will display the ereader on the bookshelf part (the left
panel) of its Library view. Now the easy part. You just drag and drop the
ebook you want to transfer from your ADE library to the ereader on the
Adobe help is not necessarily helpful. You don't have a serial number
because ADE is a free product. The Adobe tech's sometimes don't want to
help you because ADE is a free product, and will tell you that you'll have
to pay for service. Baloney. If you get someone on the phone or in a chat
session, tell them that you are a Digital Editions user, and that help for
this product is free from Adobe.
Hope this helps!