After install zend optimizer cant start apache2

[elenh]

Hello yesterday i installed via putty the zend optimizer (latest) for the needs of one custom addon.

The last last think do after the installation was to restart apache2.
i use debian server vhost and if i give in putty this command i get this message:

WPGX001:~# /etc/init.d/apache2 start
Starting web server (apache2)...(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
 failed!
WPGX001:~#

After opening the httpd.conf file i find that is emtpy and zero size
Please help my site is since yesterday off.