Problem with class cl_wd_runtime_services

Gooddayexperts I am using thisclass cl_wd_runtime_services todownload aWord fileinto aWebDynproapplications, operating correctlybutafter I downloadthe filehas 0kbwhen the actualsize is25kb.

Pleasehelp meI hope,this is thecodeI am using:

DATA: lv_filename TYPE string,
          lv_ctype    TYPE string,
          lv_content  TYPE xstring.

  lv_filename = 'Anexar.docx'.
  lv_ctype = 'pdf'.

  cl_wd_runtime_services=>attach_file_to_response(

            EXPORTING i_filename = lv_filename

                      i_content  = lv_content

                      i_mime_type = lv_ctype

                      i_in_new_window = abap_true ).

Thanks

Best regards.