MySQL database error

mysql error: Illegal mix of collations (hebrew_general_ci,IMPLICIT) and (latin1_swedish_ci,COERCIBLE) for operation '='

Query Failure: SELECT `id` FROM `category` WHERE `pageid` = 'חדשה_בבת_ים_פרטי_לחלוטין'
mysql error number: 1267
Date: 24-07-2014 05:08:30
Script: http://www.sexforfree.co.il/index.php
IP Address: 54.91.135.161