Hi Kranthi,
It is really hard to help without more information. Please always have a look at the client-side (browser) logs first to see what could be going wrong. I would recommend to follow the suggested process at http://scn.sap.com/community/gui/blog/2013/06/28/sap-screen-personas--client-side-debugging. Any kind of error that is logged or a failed request hepls usually to understand what configuration might be wrong or missing.
Cheers,
Tobias.