You seem to have all of the usual stuff (including waiting a fortnight after joining).
The only additional thing which I can think of (which has been mentioned in answer to similar questions occasionally) is to assign a classification to your avatar within Gravatar. The system is based upon the US film classification system, so you need to declare that your avatar has a 'G' rating. (That's 'General', equivalent to our 'U' for universal). Apparently AB only accepts G-rated avatars.