Radio Button is not enabled

Verygood morning,

anyone know, why this RadioButton  is notenabled, or that I haveto do,to make itenable. Is a z-field.

thank you

and this is the code.

METHOD GET_P_ZZAFLD000030.
   CASE iv_property.
    WHEN if_bsp_wd_model_setter_getter=>fp_fieldtype.
      rv_value = cl_bsp_dlc_view_descriptor=>field_type_radio.
    WHEN if_bsp_wd_model_setter_getter=>fp_onclick.
      rv_value = 'RADIO_SIE_CHANGED'.                         "#EC NOTEXT
    WHEN if_bsp_wd_model_setter_getter=>fp_radio_cols.
      rv_value = '1'.                                       "#EC NOTEXT
ENDCASE.
ENDMETHOD.

METHOD get_v_zzafld000030.
  DATA: gt_radiobutton TYPE bsp_wd_dropdown_table.
  DATA: gr_ddlb_camp TYPE REF TO cl_crm_uiu_ddlb.
  DATA: ls_radiobutton TYPE LINE OF bsp_wd_dropdown_table,
        lt_radiobutton TYPE bsp_wd_dropdown_table,
        lv_object_name TYPE string.

    ls_radiobutton-key = '1'.                               "#EC NOTEXT
    ls_radiobutton-value = 'EEAA'.                    "#EC NOTEXT
    APPEND ls_radiobutton TO lt_radiobutton.
    ls_radiobutton-key = '2'.                               "#EC NOTEXT
    ls_radiobutton-value = 'LATAM'.                         "#EC NOTEXT
    APPEND ls_radiobutton TO lt_radiobutton.
  gt_radiobutton = lt_radiobutton.

  CREATE OBJECT gr_ddlb_camp
    EXPORTING
      iv_source_type = 'T'.
  gr_ddlb_camp->set_selection_table( gt_radiobutton ).
  rv_valuehelp_descriptor = gr_ddlb_camp.
ENDMETHOD.