I'm trying to incorporate a VAT checking function in my website, for validating entered VAT.
This service is granted by european Vies WSDL service.
No matter what I try, I always get the same error:

Web service operation checkVat with parameters {xx,xxxxxxxxxxx} cannot be found.

This is the last code I tried (maybe the fifth or sixth method experimented),

just straight from the Coldfusion documentation:

<cfscript>

    ws = CreateObject("webservice",

"http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl");

    ws.checkVat("xx","xxxxxxxxxxx");

    req = getSOAPRequest(ws);

</cfscript>

<cfdump var="#req#">

<cfset soapreq = GetSOAPRequest(ws)>

<h2>SOAP Request</h2>

<cfdump var="#soapreq#">

<cfset soapresp = GetSOAPResponse(ws)>

<h2>SOAP Response</h2>

<cfdump var="#soapresp#">

Where red x represent country code and VAT number.

I'm about to let down, three days spent in trying and still no luck.
Someone willing to bang his head with mine?

Thanks anyway.