After installing and configuring MUNIN (This webpage is not available)

Question

I tried installing munin and munin-node on CEntOS 6.5

via: yum --enablerepo=epel install munin munin-node

and finished everything in good installation. I have Configured Apache by (vi /etc/httpd/conf.d/munin.conf) Editing Munin Apache configuration file and add following content:

Alias /munin /var/www/html/munin
<Directory /var/www/html/munin>
    Options FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>

I also have created the user admin and Restart Services

/etc/init.d/munin-node start
chkconfig munin-node on
service httpd restart

I followed this installation guide in this site. I have tried this and this too.

But i cant access the web gui of MUNIN. any suggestion?