Server did not recognize the value of HTTP Header SOAPAction

[tom mccarthy]

I am trying to write a client for this wsdl: 
http://jmhotlinewsstg.jmfamily.com/JMHotlinews.asmx?WSDL

However, when I write a simple axis client that goes something like this:
        String method = "SMSCheckIn";
        Service service = new Service();
        Call call = (Call) service.createCall();
        call.setTargetEndpointAddress(new java.net.URL(endpoint));
        call.setOperationName(method);
        call.addParameter("SourceAddr", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("DestinationAddr", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("CarrierName", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("CarrierID", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("IsNumberPorted", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("LocationRegistered", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("MessageText", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.addParameter("DeliveryStatusDescription", 
XMLType.XSD_STRING, ParameterMode.IN);
        call.addParameter("DeliveryStatusCode", XMLType.XSD_STRING, 
ParameterMode.IN);
        call.setReturnType(XMLType.XSD_STRING);

        Object parameters[] = new Object[] {null, null, null, null, 
null, null, message, null, null};

        return (String)call.invoke(parameters);

I get a long error along the lines of:
Exception in thread "main" AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Client
 faultSubcode:
 faultString: Server did not recognize the value of HTTP Header 
SOAPAction: .

I am not sure what this means or how to correct it. Or, indeed, if it is 
correctable. I have tried running WSDL2Java in order to help generate a 
client with little success. In that instance I was told that The prefix 
"wsdl" for element "wsdl:definitions" is not bound.

I am assuming that the web service works correctly. However, I am having 
issues creating a java client for it. If anybody has any input 
concerning these problems I'd love to hear it.