Depending what the problems with Adobe ID are ... Try:
- unregister ADE on computer (ctrl-shift-D, cmd-shift-D on Mac)
- unregister device (ctrl-shift-E, cmd-shift-E on Mac) to ADE with device plugged in
- re-register ADE on computer ((menu/Hlep/Authorize Computer on ADE2.x, Library/Authorize Computer on older more reliable v1.7.2)
- re-register the kobo (menu/Hlep/Authorize Device on ADE2.x, Library/Authorize Device on older more reliable v1.7.2)