updateHuntList XML request doesn't appear to do anything

Version 1
    This document was generated from CDN thread

    Created by: Michael Dunsdon on 10-08-2012 05:13:27 AM
    Hi
     
    I'm generating the following XML to add 2 line groups to a hunt list.
    I get a "200 OK" response back but the groups don't get added.
     
    Does anyone have an idea where I'm going wrong ?
     
    Thanks
     
    <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">  
        <SOAP-ENV:Body>   
            <m:updateHuntList xmlns:m="http://www.cisco.com/AXL/API/8.0" sequence="">    
                <uuid>{3E04B9F9-DC02-849A-71AF-2557BEEAFB83}</uuid>    
                <addMembers>     
                    <member>      
                        <lineGroupName uuid="{78AD1FF2-8286-78C6-F361-D0DE84B636D2}"/>      
                        <selectionOrder>1</selectionOrder>     
                    </member>     
                    <member>      
                        <lineGroupName uuid="{05B4D4FA-D950-ED98-DDEF-B47660A2BD99}"/>      
                        <selectionOrder>2</selectionOrder>     
                    </member>    
                </addMembers>   
            </m:updateHuntList>  
        </SOAP-ENV:Body> 
    </SOAP-ENV:Envelope>