AMTU 1.0 uses Amazon's SOAP service that is being deprecated on October 8, 2012. Please DO NOT USE this version of AMTU. The latest version of AMTU, version 2.1, uses Amazon's Marketplace Web Service (MWS). Please use version 2.1, that is available in Amazon Seller Central when you logon using your seller account. Search on AMTU to find the latest version.