NEED HELP FOR DIGITAL EDITION ANDROID TABLET

EXCUSE MY POOR ENGLISH  . The problem: on my tablet android before i have charged adobe digital edition to reed ebooks with RDM protection , but the reader (MLOL reader) sometime as well but often do not run. I have removed autorization for Adobe DRm , but now is not possibile reauthorizazion because adobe said : Too much request of authorizazion - too much devices - end autorizazion of device and retray.

But i have no one device activated so for me is impossible end authorizazion fo other devices.

Please help me. Thank you

Alessandro Italy