This forum is for Open Conference Systems (OCS), not Open Journal Systems (OJS). If you'd like to prevent users from submitting, the best way to do this is to edit each Section in the Journal Manager's "Journal Sections" interface and mark each section as only accepting submissions from Editors.
Public Knowledge Project Team
Don't miss the First International PKP Scholarly Publishing Conference
July 11 - 13, 2007, Vancouver, BC, Canada