Warning: install_main(./modules/system/system.install) [function.install-main]: failed to open stream: No such file or directory in /home/multiver/public_html/install.php on line 26

Fatal error: install_main() [function.require]: Failed opening required './modules/system/system.install' (include_path='/usr/lib/php:.:/usr/php4/lib/php:/usr/local/php4/lib/php') in /home/multiver/public_html/install.php on line 26