I am getting the error E_ADEPT_REQUEST_EXPIRED. Nothing has changed, same computer, version of ADE, Nook Color, etc. Digital Editions just stopped accepting books in the .acsm format in the last couple of days.

I am getting the error  E_ADEPT_REQUEST_EXPIRED. Nothing has changed, same computer, version of ADE, Nook Color, etc. Digital Editions just stopped accepting books in the .acsm format in the last couple of days. I have tried all of the suggested fixes, no joy. And going back the earlier version of Digital Editions will not work with the acsm format. What now?