Snom monitoring of extensions not working

-I have configured my Asterisk server and my Snom phones to monitor extension state using the SUSCRIBE/NOTIFY instructions on the WIKI.

-Current Version of Asterisk:

Asterisk CVS-Nv1-2-0-rc2-11/16/05-21:16:33

-I get the subscriptions:
asterisk*CLI> sip show subscriptions
Peer User Call ID Extension Last state Type 100 3c27bcb0cd1 102 Idle dialog-info+xml 100 3c27bcb0caa 101 Idle dialog-info+xml
2 active SIP subscriptions

-My extensions.conf look like this:

exten => 100,hint,SIP/100
exten => 100,1,Macro(std-exten,SIP/100,20,t,100@default)
exten => 101,hint,SIP/101
exten => 101,1,Macro(std-exten,SIP/101,20,t,101@default)
exten => 102,hint,SIP/102
exten => 102,1,Macro(std-exten,SIP/102,20,t,102@default)

-I have the Snom set up correctly, setting up the function keys to “destination”

However, I can’t get the following:

-LED does not light up when extenion is active, or blink when extension is called or ringing.

The missing piece(s) of the puzzle has to be with the vaguely described
"chan_sip fix" “to make Snom LEDs blink when ringing”

This was described in the WIKI, anyone out there have a clue as to how to edit this file?

I am guessing it’s in /usr/src/asterisk.

I need a HINT!