eBay FindingAPI – findItemsByProduct returns 'Invalid product ID value' error for EBAY-US site – Ebay API

I’m trying to integrate eBay API in my project.
I use ZendFramework and there is library for eBay FindingAPI, but it doesn’t work for method findItemsByProduct.

For understanding problem I wrote my small class:

<?php
class MyProject_Model_Ebay 
{
    const FINDING_API_URL = 'http://svcs.ebay.com/services/search/FindingService/v1?';

    private $appId;

    public function __construct($appId)
    {
        $this->appId = $appId;
    }

    public function findByProduct($id, $type = 'UPC')
    {
        $params = array(
            'productId.@type' => $type,
            'productId' => $id,
        );

        return $this->doApiRequest('findItemsByProduct', $params);
    }

    public function findByKeywords($keywords)
    {
        $params = array(
            'keywords' => $keywords,
        );

        return $this->doApiRequest('findItemsByKeywords', $params);
    }


    private function doApiRequest($operationName, $payload)
    {

        $global = array(
            'OPERATION-NAME' => $operationName,
            'SECURITY-APPNAME' => $this->appId,
            'GLOBAL-ID' => 'EBAY-US',
            'SERVICE-VERSION' => '1.0.0',
            'MESSAGE-ENCODING' => 'UTF-8',
            'RESPONSE-DATA-FORMAT' => 'JSON',
        );

        $ret = file_get_contents(
            self::FINDING_API_URL . http_build_query($global) . '&REST-PAYLOAD&' . http_build_query($payload)
        );

        return $ret;
    }

}

Method findItemsByKeywords works OK, but findItemsByProduct still returns error

Invalid product ID value.

I tried different variants of passing value, but it doesn’t work 🙁 Current version of passing value I saw here: how to use python xml.etree.ElementTree to parse eBay API response?

Usage:

<?php
$eBay = new MyProject_Model_Ebay(
    'My-app-id'
);

$eBay->findByProduct('4719331316129');

Response:

{"findItemsByProductResponse":[{"ack":["Failure"],"errorMessage":[{"error":[{"errorId":["41"],"domain":["Marketplace"],"severity":["Error"],"category":["Request"],"message":["Invalid product ID value."],"subdomain":["Search"],"parameter":["4719331316129"]}]}],"version":["1.11.1"],"timestamp":["2012-03-14T06:41:42.600Z"]}]}

Important!
If i change GLOBAL-ID on EBAY-DE, for example, everything is OK! What’s wrong with EBAY-US?!