php error happened

Technical information
Error type256
Error descriptionTable 'registration.CUSTOMER' doesn't exist
URLbook.calista.com.tr/registration/Reservation_Customers_list.php?
Error file/home/ftpuser/public_html/registration/connections/Connection.php
Error line642
SQL queryselect count(*) FROM `R_RESERVATION_CUSTOMER` INNER JOIN `RESERVATION` ON `R_RESERVATION_CUSTOMER`.`Reservation_id` = RESERVATION.ID INNER JOIN `CUSTOMER` ON `R_RESERVATION_CUSTOMER`.`Customer_id` = CUSTOMER.ID

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