Soap Request Microsoft Translator on Android

Hey guys, 

I am trying to use the Microsoft Translator with the SoapInterface on Android. 

But it doesn't seem to work with the translate service. 

i always get this response:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body><s:Fault><faultcode>s:Client</faultcode><faultstring xml:lang="en-US">ArgumentException: Invalid appId&#xD;
Parameter name: appId : ID=0728.V2_Soap.Translate.38F4C8DF</faultstring></s:Fault></s:Body></s:Envelope>

I have no idea what's wrong. 

My Request looks like this:

{
........{
 String authtoken=createAccessToken(clientId, clientSecret);
   request.addProperty("Authorization", authtoken);
             request.addProperty("text",textToTranslate);
             request.addProperty("from","de");
             request.addProperty("to","en");
             envelope.setOutputSoapObject(request);
             envelope.bodyOut = request;
             envelope.dotNet = true;
             envelope.encodingStyle="UTF-8";
             transport.debug = true;
             transport.call(soapAction, envelope);
}
    	
 public static String createAccessToken(String clientId, String  clientSecret){

     	String result="Bearer "+"grant_type=client_credentials&client_id="+URLEncoder.encode(clientId)+"&client_secret="+URLEncoder.encode(clientSecret)+"&scope=http://api.microsofttranslator.com";
     	return result;
     }.....
}

In my method createAccessToken, i try to create a token because appId is not valid anymore. Could someone help me?

thx a lot