I'll try to help, but I don't think you'll like the answer.
ADE is designed to run on both Windows and MAC platforms - not on tablets.
That could account for your error message all by itself.
The Nook and the ACER 500 are considered to be ereaders by ADE, which means
that ADE won't install on either one.
If you install ADE on a Windows XP computer, then you'll be able to download
ebooks to the Nook and the ACER 500. However, you have limitations on what
you can download to the ACER tablet. HERE's
supported devices, and you'll see that you'd have to have 'LumiRead' on the
tablet. BTW: I mentioned Windows XP because Win 7 seems to be causing a lot
of problems for users right now.
Most libraries use different software to manage ebooks. You might consult
with your IT people and see if they can get this sorted for you before you
become so frustrated that it's a three martini cocktail hour....
On Tue, Aug 30, 2011 at 1:47 PM, 3 frustrated librarians