Drag and drop function in web dynpro

Question

Hi Experts,
I have an ALV table.
I want to drag the row from a standard table to the ALV table.
I can drag the row but I can't drop the row in ALV table
The following code is written in method WDDOINIT in the view.
Code
Data lo_cmp_usage type ref to if_wd_component_usage.
   lo_cmp_usage =   WD_THIS->wd_cpuse_ALV_TABLE( ).
   if lo_cmp_usage->has_active_component( ) is initial.
     lo_cmp_usage->create_component( ).
   endif.
   DATA:
    lr_salv_wd_table TYPE REF TO iwci_salv_wd_table,
    l_value TYPE REF TO cl_salv_wd_config_table,
    lr_table_settings TYPE REF TO if_salv_wd_table_settings,
    lr_input_field type ref to cl_salv_wd_uie_input_field,
    value TYPE REF TO IF_SALV_WD_DROP_TARGET_INFO.
   DATA lo_INTERFACECONTROLLER TYPE REF TO IWCI_SALV_WD_TABLE .
   lo_INTERFACECONTROLLER = wd_this->wd_cpifc_alv_table( ).
   l_value = lo_interfacecontroller->get_model( ).
   CALL METHOD l_value->IF_SALV_WD_DRAG_AND_DROP~CREATE_DROP_ROW_TARGET_INFO
     EXPORTING
       id      = 'ALV_TABLE'
       name    = 'from'
       enabled = abap_true
       tags    = 'from'.
   l_value->if_salv_wd_drag_and_drop~set_drop_row_name( 'from').
   l_value->IF_SALV_WD_DRAG_AND_DROP~SET_DROP_ROW_NAME_FIELDNAME( 'fight_no').
I have created an event handler method for the drop but the method never gets called
(the event handler on click also have same problem) .
Pls help whats missing?
Thanks

Answer 1

This is my setting of drag source and the tag is same as the drop target's one.
When I try to drag, some cells doesn't show and symbol or icon, just the same curser,
while some cells will show the 'red stop' icon as below.