How to Grey out cost center column in me22n screen(Account assignment tab)

Hi All,

I have tried many ways to do grey  out cost center column in account assignment tab of ME22N.

i have created implementation for this class and method. 

Class:CL_TABLE_VIEW_MM_2

Method:PBO_TC_LINE

Below is the my code snippet.Kindly let me know any suggestions.

data:  l_tc type char100.

data:  l_tabix type i.

     l_tc = '(SAPLMEACCTVI)DYN_1000TC-COLS'.

FIELD-SYMBOLS:<fs_tcdata> type any TABLE,

                <fs_wa> type any ,

                <fs_lwa> type any,

                <fs_screen> type any,

                <fs_input> type any,

                <fs_active> type any,

                <fs_output> type any.

*data:fs_wa type SCXTAB_COLUMN_IT.

   ASSIGN (l_tc) TO <fs_tcdata>.

   LOOP AT <fs_tcdata> ASSIGNING <fs_wa>.

      l_tabix = sy-tabix.

    ASSIGN COMPONENT 'INVISIBLE' OF STRUCTURE <fs_wa> TO <fs_lwa>.

       ASSIGN COMPONENT 'SCREEN-NAME' OF STRUCTURE <fs_wa> TO <fs_screen>.

       ASSIGN COMPONENT 'SCREEN-INPUT' OF STRUCTURE <fs_wa> TO <fs_input>.

       ASSIGN COMPONENT 'SCREEN-ACTIVE' OF STRUCTURE <fs_wa> TO <fs_active>.

       ASSIGN COMPONENT 'SCREEN-OUTPUT' OF STRUCTURE <fs_wa> TO <fs_output>.

       IF <fs_lwa> = space.

         CASE <fs_screen>.

            WHEN 'MEACCT1000-KOSTL'.

             <fs_input>     = 0.

             ENDCASE.

             endif.

             ENDLOOP.

Regards,

Hiriyappa