Android : create customer in magento via SOAP API

i was trying to create customer in magento via SOAP API (customerCustomerCreate (SOAP V2)) in android app , but i get this error :

SoapFault - faultcode: '100' faultstring: 'Customer email is required' faultactor: 'null' detail: null

i set email address with this code :

 request = new SoapObject(NAMESPACE, "customerCustomerCreate");
        request.addProperty("sessionId", sessionId);

        SoapObject value = new SoapObject(NAMESPACE, "associativeEntity");
        value.addProperty("key", "in");
        value.addProperty("value", "xxxxx@xxxxx.com");

        SoapObject complexFilter = new SoapObject(NAMESPACE,
                "complexFilter");
        complexFilter.addProperty("key", "email");
        complexFilter.addProperty("value", value);
                    SoapObject filterArray = new SoapObject(NAMESPACE,
                "complexFilterArray");
        filterArray.addProperty("item", complexFilter);

        SoapObject filters = new SoapObject(NAMESPACE, "filters");
        filters.addProperty("complex_filter", filterArray);

        request.addProperty("filters", filters);

        env.setOutputSoapObject(request);

        androidHttpTransport.call("", env);
        result = env.getResponse();

Does anyone have any idea what is the wrong I am doing here? thanks