Re: Disabling 'feature_comments_moderation'
go to the Admin Home or directly by going to tiki-admin.php
From there follow these steps:
-click on the "Features" Button
-Select the "More Functionality" Tab
-There you will see the checkbox for Comments Moderation, make sure it is turned off.
-Click on the "Apply" button.
This should disable Comment Moderation and let all comments be posted without your approval.