ALV filter

hi experts,

I wanna use the filter of ALV.. why doesn't it work. what should i set when i output the alv.

i use the CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'.

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'

EXPORTING

• I_INTERFACE_CHECK = ' '

i_bypassing_buffer = 'X'

• I_BUFFER_ACTIVE = ' '

i_callback_program = sy-repid

• I_CALLBACK_PF_STATUS_SET = ' '

• I_CALLBACK_USER_COMMAND = ' '

• I_CALLBACK_TOP_OF_PAGE = ' '

• I_CALLBACK_HTML_TOP_OF_PAGE = ' '

• I_CALLBACK_HTML_END_OF_LIST = ' '

• i_structure_name = <DYN_WA>

• I_BACKGROUND_ID = ' '

• I_GRID_TITLE =

• I_GRID_SETTINGS =

is_layout = gds_layout

it_fieldcat = gdt_field_cata

• IT_EXCLUDING =

• IT_SPECIAL_GROUPS =

• it_sort = gdt_sortinfo

• IT_FILTER =

• IS_SEL_HIDE =

• I_DEFAULT = 'X'

i_save = 'X'

is_variant = gt_var

it_events = gdt_eventcat

• IT_EVENT_EXIT =

• IS_PRINT =

• IS_REPREP_ID =

• I_SCREEN_START_COLUMN = 0

• I_SCREEN_START_LINE = 0

• I_SCREEN_END_COLUMN = 0

• I_SCREEN_END_LINE = 0

• I_HTML_HEIGHT_TOP = 0

• I_HTML_HEIGHT_END = 0

• IT_ALV_GRAPHICS =

• IT_HYPERLINK =

• IT_ADD_FIELDCAT =

• IT_EXCEPT_QINFO =

• IR_SALV_FULLSCREEN_ADAPTER =

• IMPORTING

• E_EXIT_CAUSED_BY_CALLER =

• ES_EXIT_CAUSED_BY_USER =

TABLES

t_outtab = <dyn_table>

EXCEPTIONS

program_error = 1

OTHERS = 2 .

who met this issue, please give me the solution

thanks and best regards,

Kevin