asterisk users - Jul 2007 - VoiceTronix 12 + Far-End Hangup Detection

Hi all,

   I?ve 2 VoiceTronix 12 cards in my Machine with asterisk 1.4.8 running, 
everything is working fine except the detection of far-end hangup.
   There is someone in this list with VoiceTronix 12+asterisk and got 
working the detection ?
   Below are some useful information about drivers and configs.
   Someone could please give me a help ?

   Thanks in Advance,


Gleidson Antonio Henriques

VPB DRIVER - 4.1.29
ASTERISK - 1.4.8
vtcore.conf ----------------------

[general]
name=vtcore
channels=24
cards=2

[card0]
dtmfms=70
cutthrough=10.0
type=OpenSwitch12
channels=12
channel0=fxs
channel1=fxs
channel2=fxs
channel3=fxs
channel4=fxs
channel5=fxs
channel6=fxs
channel7=fxs
channel8=fxo
channel9=fxo
channel10=fxo
channel11=fxo

[card1]
dtmfms=70
cutthrough=10.0
type=OpenSwitch12
channels=12
channel0=fxo
channel1=fxs
channel2=fxs
channel3=fxs
channel4=fxs
channel5=fxs
channel6=fxs
channel7=fxs
channel8=fxo
channel9=fxo
channel10=fxo
channel11=fxo

vpb.conf --------------------------

[general]
type = v12pci
cards = 2
relaxdtmf = 1
break-for-dtmf = no
ast-dtmf-det=1
indication = 1

[interfaces]

board = 0
txgain = 12
rxgain = 12
txhwgain = 12
rxhwgain = 12
echocancel = on
UseLoopDrop = 1
context = menu-principal
mode = fxo
channel = 8
channel = 9
channel = 10
channel = 11

context = menu-principal
mode = dialtone
channel = 0
channel = 1
channel = 2
channel = 3
channel = 4
channel = 5
channel = 6
channel = 7

board = 1
txgain = 12
rxgain = 12
txhwgain = 12
rxhwgain = 12
echocancel = on
UseLoopDrop = 1
context = menu-principal
mode = fxo
channel = 8
channel = 9
channel = 10
channel = 11

context = menu-principal
mode = dialtone
channel = 0
channel = 1
channel = 2
channel = 3
channel = 4
channel = 5
channel = 6
channel = 7