Hi, i get this error FATAL ERROR: i18n::include_by_class: Class TableListField.ss.Form not found when I try to add TableListField component into administration panel.I'm using this example of TableListField

function getReportField() {		
	$resultSet = new DataObjectSet();
	$filter = '';
	$sort = "Member.ID ASC";
	$join = '';
	$instance = singleton('Member');		
	$query = $instance->buildSQL($filter, $sort, null, $join);
	$query->groupby[] = 'Member.ID';
	
	$report = new TableListField(
		'CorporateReport',
		'Member',
		array(
			'ID' => 'ID',
			'FirstName' => 'First Name',
			'Surname' => 'Surname',
			'Email' => 'Email',
			'MembershipType' => 'Membership Type',
			'MembershipStatus' => 'Membership Status',
			'DateJoined' => 'Date Joined',
			'PaidUntil' => 'Paid Until',
			'Edit' => ''
		)
	);
		
	$report->setCustomQuery($query);
		
	$report->setFieldFormatting(array(
		'Email' => '<a href=\"mailto: $Email\" title=\"Email $FirstName\">$Email</a>',
		'Edit' => '<a href=\"admin/security/index/1?executeForm=EditForm&ID=1&ajax=1&action_callfieldmethod&fieldName=Members&ctf[childID]=$ID&ctf[ID]=1&ctf[start]=0&methodName=edit\"><img src=\"cms/images/edit.gif\" alt=\"Edit this member\" /></a>'
	));
		
	$report->setFieldCasting(array(
		'DateJoined' => 'Date->Nice',
		'PaidUntil' => 'Date->Nice'
	));
		
	$report->setShowPagination(true);
	if(isset($_REQUEST['printable'])) {
		$report->setPageSize(false);
	} else {
		$report->setPageSize(20);
	}
		
	$report->setPermissions(array(
		'export',
		'delete',
		'print'
	));
		
	return $report;
}

and I want to add this table into EditForm() function in CommentAdmin, replacing $table with returned TableLIstField object from getReportField function:

$table = new CommentTableField($this, "Comments", "PageComment", $section, $tableFields, $popupFields, array($filter));
		$table->setParentClass(false);
		
		$fields = new FieldSet(
			new TabSet(	'Root',
				new Tab(_t('CommentAdmin.COMMENTS', 'Comments'),
					new LiteralField("Title", $title),
					$idField,
					$table // replaced by return of getReportField()
				)
			)
		);

In Developer mode i get error in subject, but for one, two seconds I can view correct table with correct data. What's wrong?