فایل access.log لاگ میندازه ولی فایل error.log لاگ نمیندازه

<VirtualHost *:80>
	ServerAdmin webmaster@7learn.php
    ServerName 7learn.php
    ServerAlias www.7learn.php
    DocumentRoot "C:/xampp/htdocs/7learn.php"
    ErrorLog "C:/xampp/apache/logs/7learn-php-error.log"
    CustomLog "C:/xampp/apache/logs/7learn-php-access.log" common
</VirtualHost>