Received radius reply from wrong address

Hi, i have 2 virtual servers with 2 ip addresses on same subnet.. For ex for virtserver1 192.168.1.10 virtserver2 192.168.1.11 I have a NAS Server (on a different ip subnet) with 2 different configs running on 2 different interfaces also. But as i see i got the msg Received radius reply from wrong address from them whenever i try to send a req to radius for authentication. It seems like radius answers back to the nas from first interface instead of replying from the original source address. Isnt radius suppose to reply with the same destination address it receives??? It is FreeRADIUS Version 2.0.5