Web Services through SOAP and javascript

Hi all-

I have made a web service using C#.NET, and must be able to call the
Web Methods from a client browser.  I must make this work through
Netscape 7.0(Mozilla 1.0) so from what i read, I must use SOAP.  My web
method is simple and just returns a boolean like so:

[WebService(Namespace="Say",Name="HelloWebService",Description="says
hello")]
...
[WebMethod]
public bool SayGoodBye()
{
   return false;
}


and my client code looks like this:

var soapCall = new SOAPCall();
soapcall.transportURI = "http://localhost/WebService/Service1.asmx";
soapcall.encode(0, "SayGoodBye", null, 0, null, 0, null);
var result = soapcall.invoke();
alert(result.value);



However, I get an error saying that
"System.Web.Services.Protocols.SoapException: Unable to handle request
without a valid action parameter.  Please supply a valid soap action"

then if i add the line "soapCall.actionURI = "SayGoodBye";" to the
script, i get this error:
"System.Web.Service.Protocols.SoapException: Server did not recognize
the value of HTTP Header SOAPAction: SayGoodBye."

Can anyone help?  any help would be greatly appreciated.  thanks in
advance.



Regards.