Objects not shown on a a dialog screen

Hello.

I have a dialog screen that has a container in it for the ALV screen.

Above the container, I put some text and input/output objects but when I call this screen these objects are not shown. Any idea?

in the PBO I put the following code:

 CREATE OBJECT g_custom_container
 EXPORTING
 extension = 2000.
* Creating Split Object
 IF g_split IS INITIAL.
 CREATE OBJECT g_split
 EXPORTING
 parent = g_custom_container
 rows = 1
 columns = 1.
 CALL METHOD g_split->set_border
 EXPORTING
 border = cl_gui_cfw=>true.
 ENDIF.
 CALL METHOD g_split->set_column_mode
 EXPORTING
 mode = g_split->mode_relative.
 IF cl_salv_table=>is_offline( ) EQ if_salv_c_bool_sap=>false.
 g_split_left = g_split->get_container( row = 1 column = 1 ).
* g_split_right = g_split->get_container( row = 1 column = 2 ).
 CREATE OBJECT g_split_left_con
 EXPORTING
 parent = g_split_left
 rows = 2 "SPLIT INTO Three ROW
 columns = 1. "AND ONE COLUMNS
 g_split_left2 = g_split_left_con->get_container( row = 1 column = 1 ).
 g_split_left3 = g_split_left_con->get_container( row = 2 column = 1 ).
 g_split_left_con->set_row_height( id = 2 height = 20 ).
 g_split_left_con->set_row_height( id = 3 height = 20 ).
 ENDIF.
 cl_salv_table=>factory(
 EXPORTING
 r_container = g_split_left2
 IMPORTING
 r_salv_table = gcl_table2
 CHANGING
 t_table = gt_mlst ).
 cl_salv_table=>factory(
 EXPORTING
 r_container = g_split_left3
 IMPORTING
 r_salv_table = gcl_table3
 CHANGING
 t_table = gt_ppord ).
 PERFORM field_catalog02.
 PERFORM field_catalog03.
 gcl_table2->display( ).
 gcl_table3->display( ).