Using zcs 5.0.5 Open Source Version.

I am running "website" & "zimbra mail server" on a same system hardware.-Using FC7 i386 edition.

My website & zimbra mail server is using http port. - zimbra admin works on https port.

Now, I can open my site by typing "" But,when going to open zimbra webmail service
"" it is giving me errors.

The zimbra mail server can work if I type ""

Tell me what is the reason? Below is my basic entries.

/etc/httpd/conf.d/vhost.conf file.

NameVirtualHost *:80
<VirtualHost *:80>
DocumentRoot /var/www/html
ServerName Carrier Grade Triple Play Class 5/4 Packet Switches and Services from Renovau
ErrorLog /var/log/httpd/www-error.log
CustomLog /var/log/httpd/www-access.log common

<VirtualHost *:80>
ProxyPass /
ProxyPassReverse /
ErrorLog /var/log/httpd/zimbra-error.log
CustomLog /var/log/httpd/zimbra-access.log common

below commands that i executed.

zmprov ms zimbraMailPort 81
zmprov ms zimbraMtaAuthHost
zmcontrol stop
zmcontrol start
/etc/init.d/zimbra restart

But,Still it is not working.I don't want to give 81 port id to my clients.

Tell me what to do.