Silverlight Soap Request - How to handle MessageID

Hi,

I don't know how to handle messageID in silverlight_soap_request. This message is different for all soap requests. Even, I cannot find this messageID in server response to correlate. Below is the Silverlight soap request.

silverlight_soap_request("StepName=GetUserDetails", 
        "URL=https://xxxxxx.xxxx.xxxxx/"
        "xxxx.svc", 
        "SOAPEnvelope="
            "<s:Envelope xmlns:s=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:a=\"http://www.w3.org/2005/08/addressing\">"
                "<s:Header>"
                    "<a:Action s:mustUnderstand=\"0\">http://tempuri.org/IAuthenticationService/GetUserDetails</a:Action>"
                    "<a:MessageID>urn:uuid:3b0b011f-1086-467e-8230-293a20e38feb</a:MessageID>"
                    "<a:ReplyTo>"
                "<a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>"
                    "</a:ReplyTo>"
                    "<a:To s:mustUnderstand=\"0\">https://rxxxxxx.svc</a:To>"
                  "<a:To s:mustUnderstand="0">

                "</s:Header>"
                "<s:Body>"
                    "<GetUserDetails xmlns=\"http://tempuri.org/\">"
                        "<request xmlns:b=\"http://schemas.datacontract.org/2004/07/xxxxxx\" xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\"></request>"
                    "</GetUserDetails>"
                "</s:Body>"
            "</s:Envelope>", 
        "Snapshot=t2.inf", 
        "ResponseParam=response", 
        "UserHandlerName=LrBinaryEncodingHandler", 
        LAST);

Please suggest how I can handle this messageID.

Regards,

Deepak