zabbix-server 3.0.8 can not start on rhel 6.8.

-. I already upgrade php 5.4 for zabbix 3.X install on rhel 6.8.
-. And I installed zabbix-server-pgsql, zabbix-web-pgsql, zabbix-agent, zabbix-sender.

1. zabbix-agent
1-1. zabbix-agent is start well.
[root@ip-10-0-1-61 zabbix]# service zabbix-agent start
Starting Zabbix agent: [ OK ]
[root@ip-10-0-1-61 zabbix]# service zabbix-agent status
zabbix_agentd (pid 3341) is running...

1-2. zabbix_agentd.pid is created well. (location: /var/run/zabbix/)
[root@ip-10-0-1-61 zabbix]# ll
total 4
rw-rw-r-. 1 zabbix zabbix 4 Apr 2 21:11 zabbix_agentd.pid

2. zabbix-server
2-1. I can see zabbix-server start message but in reality it's not running process.
[root@ip-10-0-1-61 zabbix]# service zabbix-server start
Starting Zabbix server: [ OK ]
[root@ip-10-0-1-61 zabbix]# service zabbix-server status
zabbix_server is stopped

2-2. Also zabbix_server.pid is not created. (location: /var/run/zabbix/)
[root@ip-10-0-1-61 zabbix]# ll
total 4
rw-rw-r-. 1 zabbix zabbix 4 Apr 2 21:11 zabbix_agentd.pid

How can I solved this problem???