I'm administrator of web and e-mail server built on a Mandriva 2009.0( 64-bit) and ISPConfig 2.2.32 On this server is hosted sites built only based on Joomla 1.5. I can’t find where is the problem with the file named (.htaccess ). WEB server with this file stops working and ignore it. At the moment it was renamed .htaccess on htaccess.txt everything goes normally. But in this case the SEO Joomla optimization is lost. Please, help me to solve this problem.