Hello, I â€˜m running Plesk 7.5.4 on a Linux RedHat9 platform. I need to install Zend Optimizer so I downloaded the installation package (2.5.10 â€“ latest one) from Zend website. The package name was ZendOptimizer-2.5.10a-linux-glibc21-i386.tar.gz (the one that is for linux-glibc21-i386 platform) which is located here: http://www.zend.com/store/getfreefi...pid=13&zbid=919 I ran the installation via SSH and answered the following questions: Q: Where is the php.ini file located? A: /etc Q: Specify location for Zend Optimizer Installation: A: /usr/local/Zend Q: Are you using Apache webserver? A: Yes Q: Specify the full path to the Apache control utility (apachectl) A: /usr/sbin/apachectl After that an installation was done and the installer performed the following actions: 1. Copied php.ini from /etc to /usr/local/Zend/etc & also placed a symbolic link to the new location in /etc 2. Added some lines to php.ini file So everything went fine so far. But after Apache restart nothing changed. I see the Zend directory in /usr/local, I see in phpinfo() that a new ini-file was used from /usr/local/Zend/etc But thatâ€™s all no ZendOptimizer running. Can someone please tell me what went wrong? What can I do to make it work? Thank you.