Hello Petr, I know and I tried it, but when I switch back to prefork I get this: +--------------------------------------------------------------------+ | *** WARNING *** | | | | You have built PHP for Apache's current non-threaded MPM. | | If you change Apache to use a threaded MPM you must reconfigure | | PHP with --enable-maintainer-zts | +--------------------------------------------------------------------+ | License: | | This software is subject to the PHP License, available in this | | distribution in the file LICENSE. By continuing this installation | | process, you are bound by the terms of this license agreement. | | If you do not agree with the terms of this license, you must abort | | the installation process at this point. | +--------------------------------------------------------------------+ The people from PHP told me to switch it to worker, but when I do that Apache doesn't even start. Any idea why? Thanks,