How to enable Zend Optimizer?
Before you are able to use Zend Optimizer you need to enable .htaccess on your account. You find the function "Set .htaccess Files" in the control panel under the Web Server tab.
Please note after enabling it it may take a few hours before this change is visible.
Zend Optimizer not installed?
This can happen in case you have upgraded from a php4 to a php5 cluster. The cause for this is most likely that you have old .htaccess-entries that refers to php4.
Remove this entries if existing.
# AddHandler application/x-httpd-php4 .php # AddType application/x-httpd-php4 .php