Hello Tony,
If it makes you feel any better, I created my first DNN installation last December with various versions of 5.0.0 CTP and 5.0.0.
During initial setups I used Whisper32 to generate my host password, and because it is easy to do, I set a password 50 characters long.
DNN takes the password, but it does not work, and you cannot log in with it, even though it is correct. I tested the length all the way down to 20 characters.
20 characters or less works fine, 21 or more silently accepted the password but it does not work.
I have not checked this on 5.1.1 but I will do and if it stil exists, I will log it in Gemini?
Does that help you ? ie, perhaps you did not get it wrong, it may have been a password length issue.
thanks
Mark