telephone 4610SW how to change for SIP usage

[ffava]

I have updated with last firmware available.
In TFTP I also have 46XXsettings.txt file.
I try to follow manual for changing between H323 and SIP (I need SIP because I'll use the phone with asterisk), but if I press Mute 744 (Mute S I G), the system simply restart.
I configured:

IP address of the phone 192.168.1.117
CallSrv=IP of asterisk server
CallPort 5060
router address = my router address 192.168.1.1
subnetmask 255.255.255.0
address of file server (192.168.1.3) (is working correctly
now, what I have to do?
Thanks

[nelr]

Have you tried Mute 2 7 2 3 8 (C R A F T) ?