Sometime God listens to His 'beloved' more than a believer and says yes more often than not.
In my opinion, a duua at a shrine is like asking for a safarish.
Dear MK Malik, Allah does not like anyone interfering in his business. He has set up everything the way he wanted it and set up zones of operation for all things including all human beings.
60 Surah al Mumtahanah Ayah 6 To End
http://www.youtube.com/watch?v=vJW_xYVBj9s&feature=related