Send email from PA30 user exit

Question

When I try to send an email from user exit in ZXPADU02 it never makes it to SOST.  WIll always go to SBWP outbox if I set the flag but never gets sent to receiver address.
If I paste the following code into a report it works fine.  Is there some other parameter for this FM or some additional process needed to send email from a user exit?
    DATA: maildata TYPE sodocchgi1.
    DATA: mailtxt  TYPE TABLE OF solisti1 WITH HEADER LINE.
    DATA: mailrec  TYPE TABLE OF somlrec90 WITH HEADER LINE.
      CLEAR maildata.
      REFRESH: mailtxt, mailrec.
      maildata-obj_name = 'SRVC_EMAIL'.
      maildata-obj_descr = 'Email test'.
      maildata-obj_langu = sy-langu.
      mailtxt-line = 'Test line from user exit'.
      APPEND mailtxt.
      mailrec-receiver = '[email protected]'.
      mailrec-rec_type  = 'U'.
      APPEND mailrec.
      CALL FUNCTION 'SO_NEW_DOCUMENT_SEND_API1'
        EXPORTING
          document_data              = maildata
          document_type              = 'RAW'
          put_in_outbox                = 'X'
          commit_work                  = 'X'
        TABLES
          object_header                = mailtxt
          object_content               = mailtxt
          receivers                       = mailrec
        EXCEPTIONS
          too_many_receivers            = 1
          document_not_sent            = 2
          document_type_not_exist    = 3
          operation_no_authorization  = 4
          parameter_error                  = 5
          x_error                              = 6
          enqueue_error                    = 7
          others                           = 8.

Answer 1

Put the function call 'SO_NEW_DOCUMENT_SEND_API1'
in a report Program & SUBMIT that report from ZXPADU02.
Arya