use "CS_BI_BOM_CREATE_BATCH_INPUT1", only one bom item saved?

hi,all. i would like create product bom through CS_BI_BOM_CREATE_BATCH_INPUT1, but only one bom item is saved. the code as follow, how can i give the parameter?

  call function 'CS_BI_BOM_CREATE_BATCH_INPUT1'

    exporting

      bdc_flag     = 'X'

      close_group  = 'X'

      commit_work  = 'X'

      bom_header   = bom_header

      group_data   = bgr00

      new_group    = new_group

      tcode_mode   = 'A'

      tcode_update = 'S'

    tables

      bom_item     = bom_item

•      bom_sub_item = bom_sub_item.