I have installed ADE 3.0, got an Adobe ID, downloaded 3xepub books, but I get two error messages "unable to process update check due to config error. Please check firewall settings or try again later" or "DR encountered an error on the activation server"

[gill_morrell]

I have installed ADE 3.0, got an Adobe ID, downloaded 3xepub books, but I get two error messages "unable to process update check due to config error. Please check firewall settings or try again later" or "DR encountered an error on the activation server" - any idea what I need to oo?