Purchase requisition Preparer

Hi, Everyone.

Purchase requisition Prepare does not show on the form. And I have analyzed the prepare name was in HcmWorker menu iitem and I have created a privilege and added an entry point to the menu item and assign the privilege to role and the role to the user but still, I didn't get it. And also prepare name was in dirpartytable and again I have added to the privilege and assigned to the role but the same answer only. 

So, Please advise on this What I have to do next.