I installed zabbix-3.0.8 on rhel 6.8.

Before go to website(http://[zabbix server IP]/zabbix),
I started zabbix-agent, zabbix-server, httpd.

But, I can't access http://[zabbix server IP]/zabbix)
I see an error messages,

404 Not Found
The requested URL /zabbix/ was not found on this server.
Apache/2.2.15 (Red Hat) Server at [zabbix server IP] Port 80.

However, I already opened the HTTP port number 80.
And, I can access http://[zabbix server IP] that is Red Hat Enterprise Linux Test Page.

What is problem in my zabbix server?
And, How to solved this problem??