problem with SSL

Hello php-general, Before, our project didnt use SSL mode and it work perfectly. But now, when we want to use ssl mode, it didnt work as we expected.. for example, when I try to type https://localhost/ it display : Fatal error: Cannot instantiate non-existent class: smarty in /var/www/html/HOME/www/index.php on line 6 but it work perfectly without ssl mode (no warning at all). and here is part of our HTTP configuration: <VirtualHost *:80> ServerAdmin omnix@omnix.se DocumentRoot /var/www/html/home/www ServerName home.com.au ErrorLog logs/home-error_log CustomLog logs/home_log common DirectoryIndex home index.php index.html AliasMatch .*/Images/(.*) "/var/www/html/home/www/Images/$1" Alias /images "/var/www/html/home/www/Images/" Alias /Images "/var/www/html/home/www/Images/" Alias /files "/var/www/html/home/www/files/" Alias /plain "/var/www/html/home/www/plain.php/" Alias /print "/var/www/html/home/www/print.php/" Alias /Admin/_submit "/var/www/html/home/www/Admin/_submit/" Alias /Admin "/var/www/html/home/www/Admin/go.php/" Alias /Member/Correspondence/_submit "/var/www/html/home/www/Member/Correspondence/_submit/" Alias /_submit "/var/www/html/home/www/_submit/" Alias / "/var/www/html/home/www/home.php/" <Directory /> AllowOverride All Options Indexes </Directory> </VirtualHost> -- Best regards, adwin