Hello, for a Domain in Plesk 8.3.0 Zend Optimizer is to be installed. I have the files in the Hosting account unpacked. Now the Zend Extension must be still loaded. The following must be registered in php.ini: zend_optimizer.optimization_level=15 zend_extension=/srv/www/vhosts/domain/httpdocs/zend/data/5_1_x_comp/ZendOptimizer.so How can I provide its own php configuration for the Domain? What do I have to make in Plesk? Thank you for your answers.