OK, that worked, without username/password.
Although it does raise the question of what to do now.
Ohoho. Hang on. I have two accounts - one at iliadreader.co.uk, and one at irexnet. Two accounts, two usernames - irextech@domain and irexnet@domain. I may have been using the wrong credentials in my "new toy new toy!" excitement last night.
Sorry. User Error. All is well now.
Thanks very much for the help.