How do i change the NAS ip address

hi, I've been configuring free radius 2.0.3, I've configured almost all the files and run successfully for the testing purpose from the localhost by using the "radtest", now I need to implement my radius in the real invironment by putting the NAS ip address, currently my NAS ip address is displayed as 127.0.0.1, I need to change this ip address. Please anybody tell how to change the NAS ip address. Thanks and Regards Elangbam Johnson