ALV Title using I_GRID_TITLE not showing up in REUSE_ALV_GRID

data:      vg_grid_title    TYPE LVC_TITLE.

move 'Batch: XXXXXX'' to vg_grid_title.

    CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
     EXPORTING
*   I_INTERFACE_CHECK                 = ' '
*   I_BYPASSING_BUFFER                = ' '
*   I_BUFFER_ACTIVE                   = ' '
   I_CALLBACK_PROGRAM                = sy-repid
       i_callback_pf_status_set          = vg_status
       i_callback_user_command           = vg_ucom
*   I_CALLBACK_TOP_OF_PAGE            = ' '
*   I_CALLBACK_HTML_TOP_OF_PAGE       = ' '
*   I_CALLBACK_HTML_END_OF_LIST       = ' '
*   I_STRUCTURE_NAME                  =
*   I_BACKGROUND_ID                   = ' '
   I_GRID_TITLE                      = vg_grid_title
*   I_GRID_SETTINGS                   =
   IS_LAYOUT                         = sg_layout

Title is not showing up.

Do i need to do anything extra.?