T38G - Softkey autoprovision not working (Remote Phone Book)

[SL2013]

I have two questions:

1.
We have a lot of T38G phones and it is very important for us to use the remote phone book if we want to transfer a phone call.
So I want to add the remote phone book to a softkey at the call state 'Transfer To'. Is that possible? I can't find an autoprovision line (like 'custom_softkey_call_failed.url') for Transfer To. What is te correct line for Transfer To?

2. I want to test with autoprovision for the softkeys. So I have the following XML file (CallFailed.XML) and this file contains the following code (I found this in some examples):

Code:

<CallFailed>
<Disable>
<Key Type="Empty"/>
<Key Type="Switch"/>
</Disable>
<Enable>
<Key Type="NewCall"/>
<Key Type="Empty"/>
<Key Type="Empty"/>
<Key Type="Cancel"/>
</Enable>
<Default>
<Key Type="NewCall"/>
<Key Type="Empty"/>
<Key Type="Empty"/>
<Key Type="Cancel"/>
</Default>
</CallFailed>

My y000000000038.cfg contains the following line:
custom_softkey_call_failed.url = http://www.myurl.com/CallFailed.XML
Before autoprovision we have the following situation:

After the autoprovision we have this situation:

It happens at all the Call States I tried.

I can't find what is going wrong. The current software version on the phone is 38.70.0.180, we have also this problem on the 38.70.0.125 and 38.70.0.105

Can you tell me how to configure (question1) and what is going wrong (question 2)? Thank you in advance.