ADE e-reader authorisation does not work

[andreasm88758426]

I am running ADE 4.5.1.133054 on Windows 7

I am using a KOBO e-reader.

I am regularly loading e-books from the library and usually it works okay.  Today, after loading a library book I could not open it on the e-reader as the DRM info did not match my device authorisation. (it opens fine on my PC running ADE).  I erased the authorisation on the e-reader using the Device Options menu on ADE.

When I try to re-authorise the e-reader, ADE sees it and I can go to the Device Options menu, but nothing works - cannot authorise, cannot read the device authorisation info.

I would appreciate any suggestions

[Nanaky]

Try to authorize the Reader direkty over the Device?

[andreasm88758426]

Unfortunately, the Kobo Aura cannot be directly authorised - only through ADE on the PC.

[Nanaky]

Was the reader of the PC detectet?

[andreasm88758426]

Yes, ADE detects the reader and I can access the files on the reader.

But when I select the "Device Options" Icon for the e-reader, all three options ("authorise Device; Device Authorisation Information; Erase Device Authorisation) are greyed out and none of the options work