asterisk users - Nov 2007 - Polycom IP601 (mac)-directory.xml changes don't update phone

Hi Polycom experts,

I'm having a problem getting changes to the Polycom IP 601's
(mac)-directory.xml file to update the button list on the phone.  If
the phone is newly provisioned (i.e. if I "Format File System" on the
phone) then the new list will show up on the buttons, but of course
this is pretty drastic way to do it.

- Environment: Asterisk test setup with 7 phones, bootrom 3.1.3, sip 2.1.2.
- I'm provisioning the phones with ftp and the phones happily download
configuration files and upload logs.
- The 000000000000-directory.xml is pretty empty:

<?xml version="1.0" standalone="yes"?>
<directory>
        <item_list>
        </item_list>
</directory>

- A typical phone specific file (mac)-directory.xml (e.g.:
0004f123456-directory.xml) looks like:

<?xml version="1.0" standalone="yes"?>
<directory>
        <!-- Ext: 202 -->
        <item_list>
                <item><fn>Park
10</fn><ct>10</ct><sd>1</sd><dc/><ad>0</ad><ar>0</ar><bb>0</bb><bw>1</bw></item>
                <item><fn>Park
11</fn><ct>11</ct><sd>2</sd><dc/><ad>0</ad><ar>0</ar><bb>0</bb><bw>1</bw></item>
                <item><fn>Ext
201</fn><ct>201</ct><sd>3</sd><dc/><ad>0</ad><ar>0</ar><bb>0</bb><bw>1</bw></item>
                <item><fn>Ext
203</fn><ct>203</ct><sd>4</sd><dc/><ad>0</ad><ar>0</ar><bb>0</bb><bw>1</bw></item>
                <item><fn>Ext
204</fn><ct>204</ct><sd>5</sd><dc/><ad>0</ad><ar>0</ar><bb>0</bb><bw>1</bw></item>
        </item_list>
</directory>

If I change a (mac)-directory.xml file on the ftp server, I'd like to
push it out to Polycom phone and ideally update the buttons on the
fly.  What's the "right" way to do this?

Thanks,
Alvin