[eluser]jedd[/eluser]
Hi jayapalchandran and welcome to the CI forums.
I think you need to give us a bit more information. I gather you're using Apache (?) - but you should probably spell these things out when reporting a problem, as well as version numbers (there's some relevant differences, for example, in the way that Apache 1.x and Apache 2.x work).
Could you show us your .htaccess file? Put it between [ code ] tags when you post it, so it really stands out.
You might also post the two sections in your config/config.php file - specifically $config['base_url'] and $config['index_page']