Sub Directory Giving 404 Error

[eluser]xitclub[/eluser]
Hi,
I have installed codeigniter in root of domain. now i am trying to install php liveadmin script and i have uploaded liveadmin folder to the same directory where codeigniter files present
now when i point my browser to www.mydomain.com/liveadmin itsgiving 404 error. please guide me how can i make it accessible ?