My website http://bakasura.in works fine. when i try to visit it via www.bakasura.in it doesnt work.
What is the problem ?
As everyone else has said i would double check DNS and then look at your web server config to make sure its set-up to respond to both.
One thing i would think about from and SEO point of view is which you want to be your main indexed URL as really you want people to find and bookmark etc by one address and stop duplicate content issues. The best solution is to 301 redirect the non primary version.