ampm0802

I moved a website to a different host. The host has the same server system as before. The login page should generate session ID and direct the user to the account page after validating the user's ID and password. However the user still sees the login page without error message, like ID/password error. All others pages that do not need session information work fine. User ID and password are stored in MYSQL. I guess  the problem is that the session ID is not generated after the validation . But I do not understand why the session ID for the user is not created . I really hope I could get some ideas from this board. Thanks. The code is as following : $error = false;   if (isset($HTTP_GET_VARS['action']) && ($HTTP_GET_VARS['action'] == 'process')) {     $email_address = tep_db_prepare_input($HTTP_POST_VARS['email_address']);     $password = tep_db_prepare_input($HTTP_POST_VARS['password']); // Check if email exists     $check_customer_query = tep_db_query("select customers_id, customers_firstname, customers_password, customers_email_address, customers_default_address_id from " . TABLE_CUSTOMERS . " where customers_email_address = '" . tep_db_input($email_address) . "'");     if (!tep_db_num_rows($check_customer_query)) {       $error = true;     } else {       $check_customer = tep_db_fetch_array($check_customer_query); // Check that password is good       if (!tep_validate_password($password, $check_customer['customers_password'])) {         $error = true;       } else {         if (SESSION_RECREATE == 'True') {           tep_session_recreate();         }         $check_country_query = tep_db_query("select entry_country_id, entry_zone_id from " . TABLE_ADDRESS_BOOK . " where customers_id = '" . (int)$check_customer['customers_id'] . "' and address_book_id = '" . (int)$check_customer['customers_default_address_id'] . "'");         $check_country = tep_db_fetch_array($check_country_query);         $customer_id = $check_customer['customers_id'];         $customer_default_address_id = $check_customer['customers_default_address_id'];         $customer_first_name = $check_customer['customers_firstname'];         $customer_country_id = $check_country['entry_country_id'];         $customer_zone_id = $check_country['entry_zone_id'];         tep_session_register('customer_id');         tep_session_register('customer_default_address_id');         tep_session_register('customer_first_name');         tep_session_register('customer_country_id');         tep_session_register('customer_zone_id');         tep_db_query("update " . TABLE_CUSTOMERS_INFO . " set customers_info_date_of_last_logon = now(), customers_info_number_of_logons = customers_info_number_of_logons+1 where customers_info_id = '" . (int)$customer_id . "'"); // restore cart contents         $cart->restore_contents();         if (sizeof($navigation->snapshot) > 0) {           $origin_href = tep_href_link($navigation->snapshot['page'], tep_array_to_string($navigation->snapshot['get'], array(tep_session_name())), $navigation->snapshot['mode']);           $navigation->clear_snapshot();           tep_redirect($origin_href);         } else {           tep_redirect(tep_href_link('my_account.php'));         }       }     }   }