Hi Raj,
Please check my last post in this thread to update custom tables on SAVE button..
http://scn.sap.com/thread/3458956
Also I found below code snippet to trigger UI refresh from a WD view..
DATA: context_element TYPE REF TO if_wd_context_element.
context_element = wdevent->get_context_element( name = 'CONTEXT_ELEMENT' ).
context_element->set_changed_by_client( ).
Thanks,
Anubhav