When I download a book in ADE apears <Unable to download, Error getting License. License server communication Problem: E_ADEPT_REQUEST_EXPIRED> I reinstalled ADE twice and it seems that my mac is autorized and my Adobe ID it's OK. I download a free e-pub from Adobe and it works, but not files URLLink.acsm. How can I solve this problem?
Two things to try.
Check your computer time. timezone and daylight savings settings.
2) Sometimes ADE gets its registration/activation confused and in a semi-authorized state.
Uninstalling and reinstalling does not help, and indeed installation can even trigger this state.
Unfortunately, it often then gives misleading error messages about what is wrong.
A common incorrect message informs you that the ID is already in use on another computer and cannot be reused.
Another is "E_AUTH_NOT_READY"
This can often be resolved by completely removing any authorization using ctrl-shift-D to the Library screen on ADE (cmd-shift-D if on Mac).
Restart ADE, and then reauthorize with your (old) Adobe ID.
In extreme cases on the mac, the following extra step has helped some people. Navigate to /Users//Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash. If you are using 10.7, see Access hidden user library files | Mac OS 10.7 Lion. http://forums.adobe.com/thread/1265248?tstart=0