Hi deepak,
I have changed sorting order to default but still no luck.its not working..and i in get_v method super class here sorting condition is there..
lt_ddlb = cl_crm_uiu_bt_act_cust_get=>get_activity_categories( iv_proc_type = lv_process_type )
In get_activity_categories method last few lines like as below..please check the code last second line
SORT st_act_cat BY value ASCENDING.
LOOP AT lt_act_cat_descr INTO ls_act_cat_descr.
ls_act_cat-key = ls_act_cat_descr-category.
IF ls_act_cat_descr-description IS NOT INITIAL.
ls_act_cat-value = ls_act_cat_descr-description.
ELSE.
ls_act_cat-value = ls_act_cat_descr-category.
ENDIF.
APPEND ls_act_cat TO st_act_cat.
ENDLOOP.
ENDIF.
SORT st_act_cat BY value ASCENDING.
rt_act_cat = st_act_cat.
.
Thanks & Regards
kalpana