Purchase Requisition Approval Problem


I try to configure simple PR workflow and the flow is straight for a same person (admin) to create PR, submit, then approve and final is manual converted to Purchase order.

I create a new PR then click "submit". The PR status is "Submitted". However, i not able filter that PR which assigned to me: admin (for approval). It return empty rows . The admin is access full permission in AX.

Any clue, what is the possiblity causing the "approval" workflow failed for activated?