I am unable to open library books on my Kobo. I get a message saying this document is protected By Adobe DRM and is not currently authorised for use with your adobe ID. This is new as I have been using the Kobo for about 3 years now. I have uninstalled ADE 2.0 and installed ADE 3.0 as advised by Kobo. I have deauthorised the ID on both computer and Kobo and then reauthorised the ADE ID on both. Still no luck. Books open fine on the pc but won't open on Kobo. I contacted Kobo who say the problem is not with their device. Any help please?