I am having a similar problem. I loaded ADE on my computer at the university without any specific code (such as Adobe ID). That worked fine for the two ACSM files I was trying to open. But when I loaded ADE on my computer at home I used the Adobe ID code, and it would not let up upload the two files I uploaded at work. This ability to move back and forth between devices was the very reason why I used ADE in the first place. But apparently, that cannot be done without errors. I'm very disappointed.
Apologies of the inconvenience faced by you,
I have raised an escalation for you, CCRT 59605, you should be contacted shortly, let us know in case of delay of more than 24 hours.
i have exactly same problems with my Icarus Ereader e654. Also authorized both devices (computer and Icarus) with same Adobe ID and i get an error when trying to open an adobe DRM protected book on my ereader. How can i fix this? I also tried to reset my ereader but still have same problem :/ I tried to open the book with an ereader from a friend (he has a Cybook) and it worked perfectly fine with same Adobe ID informations.