Ошибка При Установке Валюты

Warning: Missing argument 1 for sql::sql(), called in C:\AppServ\www\billing\svc\payment\wmu.class.php on line 100 and defined in C:\AppServ\www\billing\svc\sql.class.php on line 19

Warning: sql::include_once(C:\AppServ\www\billing\svc/sql/.class.php) [function.sql-include-once]: failed to open stream: No such file or directory in C:\AppServ\www\billing\svc\sql.class.php on line 31

Warning: sql::include_once() [function.include]: Failed opening 'C:\AppServ\www\billing\svc/sql/.class.php' for inclusion (include_path='.;C:\php5\pear') in C:\AppServ\www\billing\svc\sql.class.php on line 31

Fatal error: Class name must be a valid object or a string in C:\AppServ\www\billing\svc\sql.class.php on line 33