ALV table - cell editor??

Hi,
I am facing a strange issue, that my alv table is opening as editable format even i havnt write editable coding in doinit() method. i have written my coding in domodify().
coding as follows:
WHEN 'PRIORITY'.
DATA: lr_column_settings_PRIORITY TYPE REF TO if_salv_wd_column_settings,
        lr_column_PRIORITY    TYPE REF TO cl_salv_wd_column,
        lr_input_field_PRIORITY TYPE REF TO CL_SALV_WD_UIE_DROPDOWN_BY_KEY.
lr_column_settings_PRIORITY ?= lo_value.
lr_column_PRIORITY = lr_column_settings_PRIORITY->get_column( 'PRIORITY').
if MODIFY_PARAM eq ABAP_TRUE.
*Getting the columns settings.
CREATE OBJECT lr_input_field_PRIORITY EXPORTING SELECTED_KEY_FIELDNAME = 'PRIORITY'.
lr_column_PRIORITY->set_cell_editor( lr_input_field_PRIORITY ).
lr_table_settings->set_read_only( abap_false ).
else.
    CREATE OBJECT lr_input_field_PRIORITY EXPORTING SELECTED_KEY_FIELDNAME = 'PRIORITY'.
    lr_input_field_PRIORITY->set_enabled( abap_false ).
lr_column_PRIORITY->set_cell_editor( lr_input_field_PRIORITY ).
lr_table_settings->set_read_only( abap_false ).
ENDIF.
What is wrong in this and how initially table is populating as editable?
Please help me on this issue.
Thanks,
GS

CREATE OBJECT lr_input_field_PRIORITY EXPORTING SELECTED_KEY_FIELDNAME = 'PRIORITY'.
lr_column_PRIORITY->set_cell_editor( lr_input_field_PRIORITY ).
lr_table_settings->set_read_only( abap_false ).
else.
CREATE OBJECT lr_input_field_PRIORITY EXPORTING SELECTED_KEY_FIELDNAME = 'PRIORITY'.
lr_input_field_PRIORITY->set_enabled( abap_false ).
lr_column_PRIORITY->set_cell_editor( lr_input_field_PRIORITY ).
lr_table_settings->set_read_only( abap_false ).
ENDIF.
Write down the Read only property in your code as ABAP_TRUE.

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