How to reset/refresh previously set DTP Filter

Hi Gurus,

My requirement is to set *DTP filter values via * Code*. I am able to set the filter value , but I am not able to refreshed or reset the previously set filter values.

In the bleow mentioned code,

I am setting the value of DTP filter field 'Business Area' to 100 and filtered records are getting transfered to data target. Now, if I set the value of 'Business Area' to 200, it still shows the results of 'Business Area' = 100 . i.e. old DTP filter values are not deleted/refreshed.

Can you please suggest, how to refresh/delete the old values...

data: LCL_DTP TYPE REF TO CL_RSBK_DTP,
      LCL_REQUEST  TYPE REF TO CL_RSBK_REQUEST,
      W_LOC_DTP TYPE RSBKDTPNM ,
      LCL_FILTER TYPE REF TO CL_RSBC_FILTER,
      ws_SELTAB TYPE RSBK_S_SELECT,
      g_t_seltab type table of rsbk_s_select,
      g_t_dtprule type mch_t_sourcecode, 
      g_s_varseltab type mch_var_select,
      g_t_varseltab type mch_t_var_select, 
      g_s_seltab type rsbk_s_select,
     g_s_selfields type mch_s_field,
     g_t_selfields type mch_t_field,
     g_r_filter type ref to cl_rsbc_filter.


*Get DTP Reference 

 W_LOC_DTP = 'DTP_F0FQ2CCPA25RFLIMGD2APDK16'.         " DTP id
     LCL_DTP = CL_RSBK_DTP=>FACTORY( W_LOC_DTP ).

   * Get Filter  Reference.

      CALL METHOD  LCL_DTP->IF_RSBK_DTP_DISPLAY~GET_OBJ_REF_FILTER
      RECEIVING
      R_R_FILTER = LCL_FILTER.

  CLEAR:
g_t_seltab, ws_seltab.

* set value of DTP filter field business area to 100

             ws_SELTAB-FIELD  = 'BUS_AREA'  .
             ws_SELTAB-sign   =  'I' .
             ws_SELTAB-option =  'EQ' .
             ws_SELTAB-low   =  '100' .

              APPEND WS_SELTAB TO g_t_seltab.
              clear ws_seltab.

 CALL METHOD LCL_FILTER->SET_SELTAB
      EXPORTING
      I_T_SELTAB = g_t_seltab.

LCL_DTP->activate( ).

Regards

Mohit