Acess reject dropped by freeradius

Hi, I am using freeradius 2.2.1 Whenever I use wrong credentials, NAS sends access reject. Access reject packet is received when I do a packet capture. But freeradius doesn't acknowledge access reject the same way it does for access accept. I changed reject_delay parameter to 0. But I still don't receive the access reject from freeradius. So every time wrong credentials is entered, I get time out instead of access reject. Is there some other configuration is need to change ? Regards, Sairam