pkKumar - 5:07 am on Jan 15, 2013 (gmt 0)

Just curious, did your site have a mobile version pkKumar?

No i don't have a mobile version currently, i think my problem may be canonical issue but why it is occurring i have no idea, i am linking the site in www form, moreover i have set domain with www as prefers domain.
Wait i have not set my preferred domain when i submit the site to gwt. I did the same after some time may be after 2 months.