Verify the ClassifiedApprovalPage Organization Setting is set to the correct page. This page should be the Classified Approve page with only the security roles that are set to approve classifieds. These roles should have View, Edit and Approve permissions.
Start the Classified Cleanup Agent. Be sure to customize the agent settings.
Verify Classified Approval Page Organization Setting.
Customize Classified Expire Days Organization Setting.
Customize Classified Category and Classified Type.
Set security for users who can view and approve.