[14-Sep-2011 03:51:04] PHP Fatal error: Class 'notifier' not found in /home/vinyhaa1/public_html/mailorder/includes/autoload_func.php on line 79

This is the error message i get in the debug log. I can access the admin backend just fine now and seems to be looking fine. But now i cant access the front end of the shopping cart, because i get a 500 error. This is what shows up in the cache debug file.

no clue what it means, or how to fix it.