I actually recommend you set
and not use the membership provider's question and answer functionality.
The reason for that is that MS did not implement it very well, and if requiresQuestionAndAnswer is turned on, administrator's cannot reset a user's password without knowing the password themselves.
Additionally, MS never provided a control for changing the question and answer, and one hasn't been built for the FBA Pack. So at the moment, once the question and answer have been created, they are stuck at their initial values.