Error : Cannot display page when clicking other button in Managed Attachment case (ecm)

I’m on my way in integrating Oracle EBS 11i with UCM 11g using Managed Attachment solution.

The problem comes when I try to continue step on OAF page after upload document in managed attachment button. This is the step that I do :

1.       In OAF page (EBS 11i) that contain managed attachment button, click this button.

The page at iProcurement responsibility, then Internet Procurementà iProcurement Home Page. In requisition Information : Edit Lines page, select the Attachment tab.

Note : the parameters that used in database are :

-          businessObjectType (entity)                           : PO_REQUISITION_HEADERS_V

-          businessObjectKey1(PrimaryKey)                : REQUISITION_HEADER_ID

-          businessObjectValue1 (viewObject)             : PoRequisitionHeadersVO

-          view attribute                                                   : RequisitionHeaderId