I coud not authorize my adobe digital editions

I followed these steps

Close all applications.

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

Select the Adept key.

Choose File > Export.

In the Export Registry File dialog box, select Selected Branch under Export Range. Enter a name and location for the backup registry key, and then click Save.

Right-click the Adept key and choose Delete.

In the Confirm Key Delete dialog, click OK.

Close the Registry Editor.

Open Adobe Digital Editions and reauthorize.