CALL METHOD xxx->set_current_cell_via_id

hi all ...

i have the following request and i'm not far away from a mental breakdown 😉

this is my coding:

CALL METHOD grid->set_table_for_first_display

EXPORTING

i_structure_name = 'IT_DIALOG'

is_layout = ls_layout

it_toolbar_excluding = it_toolbar_excluding

CHANGING

it_outtab = lt_dialog

it_fieldcatalog = lt_fieldcat

EXCEPTIONS

invalid_parameter_combination = 1

program_error = 2

too_many_lines = 3

OTHERS = 4.

CALL METHOD cl_gui_alv_grid=>set_focus

EXPORTING

control = dialogbox

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

OTHERS = 3.

CALL METHOD grid->set_ready_for_input

EXPORTING

i_ready_for_input = 1.

CALL METHOD grid->refresh_table_display

EXPORTING

i_soft_refresh = 'X'.

lt_col_id-fieldname = 'SERGE'.

lt_row_id-index = '1'.

lt_row_no-row_id = '1'.

CALL METHOD grid->set_current_cell_via_id

EXPORTING

is_row_id = lt_row_id

is_column_id = lt_col_id

is_row_no = lt_row_no.

i want to set the input cursor to the column "SERGE" in my alv grid ... this alv grid only has one row, every time!

what am i doing wrong?

the "SERGE" cell is selected, but the cursor inside is not active/blinking!

TIA!

christian