Purchase Order to Order Based Transportation Request Scenario Failing

Hi Folks,

    We are configuring an Integration Scenario between SAP ERP & SAP TM. Where we expect when we create or change a Purchase Order in the ECC system we expect an Interface "POP_TransportationRequestSUITERequest_Out" to be triggered and create an OTR in the SAP TM system, which is not happening rather there are other 4 interfaces getting triggered and those are as below

PurchaseOrderERPRequest_Out_V1

PurchaseOrderERPReplenishmentOrderCollaborationNotification_Out

PurchaseOrderChangedInformation_Out

PurchaseOrderCreatedInformation_Out

The below are the configurations we did in ECC

Output Type: TRP0

Processing Program: RSNASTED

Form: INITIALIZE_WORKFLOW

Note: When we create a PO the TRP0 output type doesn't appear in the Output Type (ME22N->GoTo->Messages) automatically.

Appreciate your expert advice.

Regards