There is a good chance if you didn’t get any messages, that you didn’t do anything wrong. There has been a change that affected a lot of people that had TL3 permissions account-wide from past Beta participation, I was one of them.
I ended up having to up my posts read count to reacquire it. There are several posts on this in the CS, Website, and GD forums about it. Below are links to a more thorough explanation and a thread where some of the Blues have been letting people know where they are short on requirements: