سلام چندتا از کامپوننت های که نصب کردم اجرا نمی شه و همشون این پیام رو میدن

Warning: JLoader::include(D:\vhosts\khesht.org\httpdocs\lib raries\joomla\utilities\string.php) [jloader.include]: failed to open stream: No such file or directory in D:\vhosts\khesht.org\httpdocs\libraries\loader.php on line 80
Warning: JLoader::include() [function.include]: Failed opening 'D:\vhosts\khesht.org\httpdocs\libraries\joomla\ut ilities\string.php' for inclusion (include_path='.;./includes;./pear') in D:\vhosts\khesht.org\httpdocs\libraries\loader.php on line 80