major custom error handler clash

hi there , i have been rebuilding my classes with their own custom error handler function and i usually use trigger_error to trigger an error internally , i have a DB and Auth class which both are used together , the constructors in the error classes look like $GLOBALS['_ERROR_HANDLER_OBJECT_DB'] = &$this; $GLOBALS['_ERROR_HANDLER_METHOD_DB'] = '_catch'; function db_error_handler($type, $message, $file=null, $line=null, $vars=null) { return $GLOBALS['_ERROR_HANDLER_OBJECT_DB']-> $GLOBALS['_ERROR_HANDLER_METHOD_DB']($type,$message, $file, $line, $vars); } set_error_handler('db_error_handler'); and in my erorr handler class it looks like $db_error = new DB_Mysql_Error(true); $auth_error = new HTTP_Auth_Error; if i have the auth error after the db , if i get a mysql error the auth error will be fired, if i switch it around , if i get an auth error the db error will be fired off , i have to setup the error objects as just setting up the base classes will not trigger these :\ , this suddenly just happended this morning where they were only working just the other day , what can i do ?