I have two servers with magento 1.9 installed. By accessing the url of their SOAP, the porttype gets different name; In one gets Mage_Api_Model_Server_V2_HandlerPortType and other portType only.
This is some config serve?
URL of the WSDL
http://megasul.mtsys.com.br/api/v2_soap?wsdl
https://www.primaverasportcenter.com.br/homologacao/api/v2_soap?wsdl