I can't read acsm files on my e-reader after transferring them from the pc with ADE. it seems to work, but then when I try to open the files on the e-reader it says "open failure". what's wrong?

The acsm file is not the book, it is a ticket to get the book.  I sometimes get library books online, here is what I do.

1. Start ADE on the computer

2. Go to library website and find the book I want to download.

3. Click on the download link

4. In windows 7 a box opens asking whether I want to open( or run) or save the acsm file

5. Click open/run and ADE downloads the book into the "Library"

6. Transfer the book (epub file) to the reader.

Please ensure that your e-reader is authorized with same credentials as your pc.

If yes, then please try to transfer the book itself.