essteffan wrote:but i jest copy from Zend Optimizer installer from zend.
What Z O installer is that?
Where did you put it?
Is it php 5.3x compatible to work with the php compiled in XAMPP 1.7.4 version?
The last question is most important as you will not be able to use it if it not, it will only give errors that can't be fixed.
More reading for you as obviously you are intent on having a go, which is futile if your Z O is not php 5.3x compatible. The Z O version referred to in the version 1.7.4 readme_en.txt file is 3.3.0
The version referred to in the topic below is an even newer incompatible version.viewtopic.php?f=16&t=40597&hilit=zend+optimizer
Sorry I can't be any more help.