Programming "dialing" softket

[Simon4acre]

I have looked at several of the posts about this and tried several options but still cannot get it to work

I have a T22 phone on vers 7.71.0.168 working with a version12 3cx

I have downloaded the "dialing.xml" file and edited it so the group pickup key replaces the send key

ialing>
<Disable>
<Key Type="Empty"/>
<Key Type="History"/>
<Key Type="Directory"/>
<Key Type="Switch"/>
<Key Type="Line"/>
<Key Type="Favorite"/>
<Key Type="GPickup"/>
<Key Type="DPickup"/>
<Key Type="Retrieve"/>
<Key Type="Send"/>
</Disable>
<Enable>
<Key Type="GPickup"/>
<Key Type="IME"/>
<Key Type="Delete"/>
<Key Type="Cancel"/>
</Enable>
<Default>
<Key Type="GPickup"/>
<Key Type="IME"/>
<Key Type="Delete"/>
<Key Type="Cancel"/>
</Default>
</Dialing>

I have an SNPBX machine running Windows 7 with an IP address of 192.168.1.210.

My question is where do I place the "dialing.xml" file and exactly what path do I add to the provisioning template.

I have tried various combinations based on
custom_softkey_dialing.url = http://<server>/<path>/dialing.xml

but none work