Unable to read books with DRM (KOBO Libra H2O)

[#1]

Hi

my problem is related to books with a DRM licence. I can read them with a dedicated online app, but if i try to export/open them with my KOBO Libra H2O they can not be opened; the book's icons are black and KOBO gives an error message saying that my e-Reader is not authorized to open the books.

The problem is that it is AUTHORIZED, and the PC too, using Adobe Digital Editions app.

thanks for your help

Andrea

[#2]

Me also. Is there anyone out there who can assist

[#3]

Same problem with the same device, contact KOBO with no help for me. They suggested to install version 3.0 ADE but my MAC does not support old version 32 bits 

Is there someone Here who have a solution