404 Error File Not Found

[eluser]Unknown[/eluser]
Hi am new in codelgniter. am trying to devlop a website in codelgniter.
it is working fine in local server. but it is showing an error message "404 Error File Not Found"--I am unable to find out...please help me...

you can see the error on http://www.billbahadur.com/demo/klickcha....php/login

please help me...