not setup as a worker

You are not setup as a worker. To access this Page you need to be a worker. EBS  R12

this is the problem 

How to solve it. 

To solve this issue, Enter person name to your user name and the person should be registered as buyer.

1. create Employee (Human Resources>> People>> Enter and Maintain), Person types should be ‘employee’ now.
2. Add this new employee to your user name ( System Administrator>> Security>> User>> Define ), Add newly created employee in the person field.
3. Adding a new buyer ( Purchasing>> Setup>> Personnel>> Buyers), Click AddBuyer button and search for your newly created employee and select it and save it. New buyer is added.