Inverse polarity / callprogess (urgent please)

Hello !
i use a-1200p with asterisk with gsm fixed terminal (it support Inverse polarity)
but call progress don't work asterisk don't feel when the call answered and it still ringing for ever

my zapta.conf

[trunkgroups]

[channels]
;hanguponpolarityswitch=yes
language=en
context=amr
signalling=fxs_ks
rxwink=300 ; Atlas seems to use long (250ms) winks

usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no
echotraining=800
rxgain=0.0
txgain=0.0
callgroup=1
pickupgroup=1
immediate=yes
callprogress = yes
busydetect=yes
;busypattern=500,500
busycount=4
group=0
channel => 1
channel => 2
channel => 3
channel => 4
[root@localhost asterisk]#



about dial plan i use mor pro
www.kolmisoft.com/mor/content/view/79/89/


how can i fix that ?

Regards,

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