[syslog-ng] Syslog Problem

Hi, I have configured a syslog-ng server to capture network logs. I can able to fetch network logs of three devices. But in fourth network device I can able to see packets are get polling into the syslog server in port 514 by using tcpdump command but I cannot find the network device in syslogng front end. Syslog OS : CentOS release 6.5 (Final) Syslog Version : syslog-ng 3.2.5 Along with this mail I have attached configuration file of syslogng server. Please help me to resolve this issue. Regards, N.B.RIAZ AHMED (9047166496) https://www.csscorp.com/email-disclaimer