Using Custom Vhost Entries for Webmail, MySQL, Etc.

[akong]

Hello,
I use centos 6.6.But I got 500 error.I have set custom apache config.
I want use webmail.minsubnb.com.tw

</VirtualHost>

# Configuration for WebMail
<VirtualHost *:80>
   ServerAdmin mail@minsubnb.com.tw
   DocumentRoot "/etc/sentora/panel/etc/apps/webmail/"
   php_admin_value open_basedir "/etc/sentora/panel/etc/apps/webmail:/var/sentora/temp/"
   php_admin_value suhosin.executor.func.blacklist "passthru, show_source, shell_exec, system, pcntl_exec, popen, pclose, proc_open, proc_nice, proc_terminate, proc_get_status, proc_close, leak, apache_child_terminate, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid, escapeshellcmd, escapeshellarg, exec"
   ServerName webmail.minsubnb.com.tw
   AddType application/x-httpd-php .php3 .php
   <Directory />
       Options FollowSymLinks Indexes
       AllowOverride All
       Order Allow,Deny
       Allow from all
   </Directory>

Could I setup error?