I'm in the exact situation as the last post here... since Oct 2013 and we're all still having the same issue
I would just like to get rid of the adobe sign-in at this point. I can silently install with serial and no EULA and no registration which is great, but sign-in with Adobe ID is the last step.
According to the aptee documentation, if AE12 counts as CS6, Return Code = 14 could mean "Unknown Error", which isn't really helpful.
Help Adobe-wan-Kenobi's, you're our only hope...