CL_SALV_TABLE remove Sort/Filter

Hi experts,

I want to remove the sort and filter options from cl_salv_table output.

      lr_functions_so->set_sort_asc( abap_false ).

      lr_functions_so->set_sort_desc( abap_false ).

      lr_functions_so->set_group_sort( abap_false ).

      lr_functions_SO->SET_GROUP_FILTER( ABAP_FALSE ).

      lr_functions_so->set_group_subtotal( abap_false ).

I use the above code but when I right click on any column, the sort and filter functions are available.

Plz help how can I disable these options.