Unable to open acsm files in ADE. "Error! Check activation." Any idea?

[lea_kp]

Unable to open acsm files in ADE (e-books I have recently bought and borrowed, too). I get the message "Error! Check activation." The ADE programme is authorized on both PCs in use. Any idea?

[chiragjuneja]

Try de-authorizing and then re-authorize the computer.

Please make sure that you remember the user-id/password correctly.

[lea_kp]

Thank you! It worked on both PCs. I managed to open the e-books ...