Apache virtualhost setting always fail after reboot

Just setup an apache webserver with the following virtualhost:

 <virtualhost 123.45.67.89:80="">ServerAdmin admin@mysite.com
    ServerName mysite.com
    ServerAlias www.mysite.com
    DocumentRoot /srv/www/mysite.com/public_html
    ErrorLog /srv/www/mysite.com/logs/error.log
    CustomLog /srv/www/mysite.com/logs/access.log combined</virtualhost> 

And the I disabled the default virtualhost and enable mine:

a2dissite default

a2ensite mysite.com

Reload:

/etc/init.d/apache2 reload

My /etc/hosts is as follow:

127.0.0.1   localhost.localdomain   localhost
123.45.67.89   myhost.mysite.com   myhost

And then I tested by accessing http://mysite.com and http://www.mysite.com, everything works fine.

The problem is, everytime I reboot my box, I can no longer access my site anymore.

Doesn't work with http://mysite.com and http://www.mysite.com.

The only way I can make it work again is by issuing /etc/init.d/apache2 reload everytime after rebooting.

This happens all time time everytime I reboot (tried it multiple times in the past 2 days).

Any suggestions?

Thanks in advance.