Presence Web Service (REST) vs Jabber Windows Client

I am trying to use the REST API to set a user's overall presence, and the rich custom status ("note") to a specific value.

When setting an 'available' status there are no problems, but I have issues when trying to set a 'busy', 'away' or 'dnd' status, where the basic presence usually reverts to Available and ignores the note/custom status;

For example, using a pidf containing this (below) returns http 200 OK but only changes the presence to Available with no note.

PUT /presence-service/users/myusername/presence/rich HTTP/1.1

Host: <cup-ip>:8083

Presence-Session-Key: 54f5ac5f-20d-4b27200a-6334-2

Presence-Expiry: 3600

Presence-Override: false

<?xml version="1.0" encoding="UTF-8" ?>

<presence xmlns="urn:ietf:params:xml:ns:pidf" xmlns:rp="urn:ietf:params:xml:ns:pidf:rpid" xmlns:dm="urn:ietf:params:xml:ns:pidf:data-model" xmlns:ce="urn:cisco:params:xml:ns:pidf:rpid" xmlns:cisco="urn:cisco:params:xml:ns:pidf:source" xmlns:so="urn:cisco:params:xml:ns:pidf:source" xmlns:sc="urn:ietf:params:xml:ns:pidf:servcaps" entity="sip:myusername@mydomain.local">

    <ce:person id="myusername">

        <activities>

            <away/>

        </activities>

        <class>manual</class>

        <note>set programmatically</note>

    </ce:person>

<tuple id="cisco-pws">

<contact priority="0.5">sip:myusername@mydomain.local</contact>

<so:source>Presence Web Service</so:source>

<sc:servcaps>

<sc:audio>false</sc:audio>

<sc:video>false</sc:video>

<sc:text>false</sc:text>

</sc:servcaps>

<status><basic>open</basic></status>

</tuple>

</presence>