Zend issue for Vshare install

I have Server (my own) with CentOS 5 installed (Apache2, PHP5, Mysql..) I installed the Zend Optimizer (3.3.0a) and that ran fine, the phpinfo.php shows the Zend Engine installed as well but when i go to http://myIP_orhostname/install i get the page stating Zend isn't installed :(

Can someone help?

Are you able to see Zend Optimizer in your phpinfo() ?

May be you are using different php.ini for the web site that have no Zend. What is your site url ?

Sorted, I have CentOS 5 and had to disable SELinux for it to work :)