Q&A problem

Hi support,

I am using Q&A Plugin for my multi-site. I want only registered user can post questions. How to set up that?

In the Question->setting

– Administrator

– Editor

– Author

– Contributor

– Subscribers

which one applied to my registered user? I allowed all type of the above users to View/ Ask/ Edit/Delete for question and answer. However, when my registered user login there is only one Q&A Search box.