Testing ECC_FKK_CASHPNT_OPBYELEMQR web service

Hello,

I try testing the  ECC_FKK_CASHPNT_OPBYELEMQR web service using the test program RFKKEXC_OPENITEM_XI_TEST provided by SAP; when I execute the program after providing the valid parameters I get the fatal error "An internalerror occurred inAPISystem LandscapeDirectory." After debuging the problem appears in the class CL_FKK_XI_FACADE in create methood

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method CREATE .

data: errortext type string,

      l_bapiret2 type bapiret2.

  IF xo_facade IS INITIAL.

    CREATE OBJECT xo_facade.

    CALL FUNCTION 'FKK_GET_APPLICATION'

      EXPORTING

        i_no_dialog = 'X'

      IMPORTING

        e_applk     = _applk.

    CALL FUNCTION 'LCR_GET_OWN_BUSINESS_SYSTEM'

      IMPORTING

        bs_key_name                  = _business_system

      EXCEPTIONS

        error_message                = 1.

    IF sy-subrc ne 0.

      MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

              INTO errortext

              WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.

.....

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the  CALL FUNCTION 'LCR_GET_OWN_BUSINESS_SYSTEM' fails.

This FM is used to create the receiver for the xi response, I think I need some configuration for the XI.

I also try to test the web service using  the SOAPUI but I get "OBJECTS_OBJREF_NOT_ASSIGNED " because the receiver can't be created

in the convert_outbound message.

Can some one help me to configure the XI to be able to test this web service.

For the configuration we have SAP Netweaver7.1 with ABAP STACK, we don't have the JAVA stack installed.

Best regards.