Vendor Account Not Listed?

I have my book, purchased from the AICPA, on a flashdrive. When I pull it up, Adobe Digital Systems asks for the authorization.

No worries, I enter in with my Adobe ID, but get this message:

I've tried restarting the computer and changing my ID, but no results. I think it's possibly because I can't select AICPA as the vendor? Many thanks for your help!