Site is not running due to redirect mode of codeigniter

[eluser]MianUsman[/eluser]
Hi,

i m working on a codeigniter and my site is not working without writing index.php with URL and also it only shows default controller with index.php and it didn't run any other controller with OR without index.php


e.g. www.mysitename.com/index.php it show default controller
www.mysitename.com it show me the 404 page of codeigniter.
www.mysitename.com/anycontroller it show me the 404 page of codeigniter.
www.mysitename.com/index.php/mycontroller it show me the 404 page of codeigniter.


please help me out.


Thanks in Advanvce

Usman Abdul Razzaq