WebService Unrecognized binding style error

Question

I am trying to access a webservice method throught action
Script. I just need to call a method " RequestSomeMethod"and send 2
parameters. But am getting following error :
RPC Fault faultString="Unrecognized binding style 'null'.
Only 'document' and 'rpc' styles are supported."
faultCode="EncodingError" faultDetail="null"
I am not expecting anything back from the webservice. I just
need to call the method so that it takes some action.
Can please somebody help me with this and tell me why am I
getting this error and how to get rid of it?
Attacjed is the code I am using:
<?xml version="1.0"?>
<mx:Button xmlns:mx="
http://www.adobe.com/2006/mxml"
click="useWebService()" width="80%" >
<mx:Script>
<![CDATA[
import mx.rpc.soap.LoadEvent;
import mx.controls.Alert;
import mx.rpc.http.HTTPService;
import mx.rpc.soap.WebService;
import mx.rpc.events.ResultEvent;
import mx.rpc.events.FaultEvent;
private var ws:WebService;
private var para1:Number;
private var para2:int;
override public function set data(value:Object):void
para1=1;
setStyle("color", "red");
enabled=false;
label ="Do not click";
para2=0
public function useWebService():void {
ws = new WebService();
ws.addEventListener("fault", faultHandler);
ws.addEventListener(LoadEvent.LOAD,wsLoaded);
ws.addEventListener(ResultEvent.RESULT, result_listener);
ws.wsdl= "someurl?wsdl";
ws.loadWSDL();
private function wsLoaded(loadEvent:Event):void{
ws.RequestSomeMethod(para1, para2);
public function echoResultHandler(event:ResultEvent):void {
Alert.show("WSDL returned");
public function faultHandler(event:FaultEvent):void {
trace(event.fault);
public function result_listener(event:ResultEvent):void {
]]>
</mx:Script>
</mx:Button>

Answer 1

In the wsdl file that I am accessing, some of the tags it has
are as below. It does not have style property in soap binding tag,
but is in operation tag. Is that OK? or does flex expect it to be
in soap binding tag and hence give me this error?:
- <wsdl:binding name="abc" type="tns:IJK">
<wsp:PolicyReference URI="#XYZ" />
<soap12:binding transport="
http://schemas.xmlsoap.org/soap/http"
/>
- <wsdl:operation name="RequestDetails">
<soap12:operation soapAction="
http://tempuri/RequestDetails"
style="document" />
- <wsdl:input>
<soap12:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap12:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>