Issue on receiving searchResEntry message from AD server

Hi All, I'm using freeradius-server-2.1.12.[ though its bit old version]. I've made a setup with my linux machine to work as radius server[ free radius is installed here]. For user LDAP authentication I'm using Windows 2003 server. My LDAP search works fine on receiving searchResDone from AD server.User authentication works fine. But on receiving searchResEntry message from AD server, My radius clients doesn't do anything and after few seconds the UnbindRequest is Sent from radius client. I've attached the packet capture. Please guide me to fix this issue other than upgrading the free radius server as its no feasible for me at this moment. Thanks, Adarsha