problem connection to web service

Hi ,

I need your help. I would like to check the list item from the web service to validate the licence field. However I got the message

getAllServiceNames is not function. I dont' know why??? I have spend a lot to time to fix but I it is not successful.  Please help.

SOAP.wireDump = false;
var cListURL = "http://......wsdl/";
var e;
try
{
console.println("Start list retrieval");
var service = SOAP.connect(cListURL);
if(typeof service != "object")
console.println("Couldn't get List object");
if(service.getAllServiceNames == "undefined")
console.println("Couldn't get getAllServiceNames Call");
// Make the query
var result = service.getAllServiceNames();
if(result == null)
console.println("List returned nothing");
var count = 0;
var limit = 10;

form1.class1.body.licenceInfo.wellLicence.rawValue = limit;

}
catch(e)
{
console.println("Problem with list Call: " + e);
}

Thanks in advance, Cindy