Error when change payment information

When i try edit address information, get error “cant change information because no write name and soname”, but i write. Also when open it, cant get information from database about name and soname…

<?php
/**
 * Edit address form
 *
 * @author 		WooThemes
 * @package 	WooCommerce/Templates
 * @version     2.1.0
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

global $woocommerce, $current_user;

$page_title = ( $load_address == 'billing' ) ? __( 'Billing Address', 'woocommerce' ) : __( 'Shipping Address', 'woocommerce' );

get_currentuserinfo();
?>

<?php wc_print_notices(); //print_r($_POST);?>

<?php if ( ! $load_address ) : ?>

	<?php wc_get_template( 'myaccount/my-address.php' ); ?>

<?php else : ?>

	<form method="post">

		<h3 class="my-account-title"><?php echo apply_filters( 'woocommerce_my_account_edit_address_title', $page_title ); ?></h3>

		<?php do_action( "woocommerce_before_edit_address_form_{$load_address}" ); ?>

		<?php foreach ( $address as $key => $field ) : ?>

			<?php woocommerce_form_field( $key, $field, ! empty( $_POST[ $key ] ) ? wc_clean( $_POST[ $key ] ) : $field['value'] ); ?>

		<?php endforeach; ?>
			<?php do_action( "woocommerce_after_edit_address_form_{$load_address}" ); ?>
		<p>
			<input type="submit" class="btn btn-primary" name="save_address" value="<?php _e( 'Save Address', 'woocommerce' ); ?>" />
			<?php wp_nonce_field( 'woocommerce-edit_address' ); ?>
			<input type="hidden" name="action" value="edit_address" />
		</p>

	</form>

<?php endif; ?>

I use wocommerce 2.2.6. I check but this file is same with this version. POST msg:

Array ( [d0-be-d0-bf-d0-bb-d0-b0-d1-82-d1-8b_first_name] => name [d0-be-d0-bf-d0-bb-d0-b0-d1-82-d1-8b_last_name] => soname [d0-be-d0-bf-d0-bb-d0-b0-d1-82-d1-8b_postcode] => zip [d0-be-d0-bf-d0-bb-d0-b0-d1-82-d1-8b_city] => city [save_address] => Save address [_wpnonce] => fce4020ac3 [_wp_http_referer] => /my-account/edit-address/%D0%BE%D0%BF%D0%BB%D0%B0%D1%82%D1%8B/ [action] => edit_address [d0bed0bfd0bbd0b0d182d18b_first_name] => [d0bed0bfd0bbd0b0d182d18b_last_name] => [d0bed0bfd0bbd0b0d182d18b_postcode] => [d0bed0bfd0bbd0b0d182d18b_city] => [d0bed0bfd0bbd0b0d182d18b_phone] => [d0bed0bfd0bbd0b0d182d18border_comments] => [d0bed0bfd0bbd0b0d182d18b_street] => [d0bed0bfd0bbd0b0d182d18b_house] => [d0bed0bfd0bbd0b0d182d18b_new_fio] => [d0bed0bfd0bbd0b0d182d18b_new_passport] => )

https://www.ads-software.com/plugins/woocommerce/