Release Approved purchase requisition- Workflow


we have recently enabled Purchase Requisition with approval workflow in Ax 2012 R2.

Purchase Requisition workflow works fine,

once it’s approved its suppose to check Purchase Order workflow, where it will verify the Rates from purchase agreement it will approve automatically.

instead of purchase order workflow, it’s directly going to approved staus where users can confirm the PO Directly.

Kindly advise how to add purchase order flow upon release approved Purchase Requisition.