Error activation code

[MaxEnergy200]

I recieved error! check activation error in Adobe Digital Editions 4.0 after trying to upload a book from the public library the book is an epub book.  I have tried to reinstall the software but it still wont work ,have also tried Adobe Digital editions 3.0 and still wont work.   I tried to deauthorize the computer but the system tells me to come back later.   What could be the problem?

[shreya]

For this problem, you need to deauthorize and authorize ADE again.

If due to some reason, you are unable to deauthorize ADE, follow the below steps:

Mac: Navigate to /Users//Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash.

ADE will be deauthorized now.

Now Authorize ADE again.

Windows:

Choose Start > Run.

In the Open text box, type regedit and then press Enter. The Registry Editor opens.

In the left pane of the Registry Editor, locate the following registry key:

HKEY_CURRENT_USER\Software\Adobe\Adept

Right-click the Adept key and choose Delete.

In the Confirm Key Delete dialog, click OK.

Your authorization will be deleted.

Now Authorize ADE again

Hope this works !!.