Asterisk don't detect incoming calls with TDM410 FXO cards

I can call out via FXO card but I can’t receive PSTN call in my asterisk server.
Card Digium TDM410P has 2 ports FXO.
I config : chan_dahdi.conf
[channels]
context=incoming
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
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no
faxdetect=incoming
echotraining=800
rxgain=0.0
txgain=0.0
callgroup=1
pickupgroup=1
;Uncomment these lines if you have problems with the disconection of your analog lines
busydetect=yes
busycount=3
hanguponpolarityswitch=yes
immediate=no
#include dahdi-channels.conf
dahdi-channels.conf :
;;; line="3 WCTDM/0/2 FXSKS (EC: MG2 - INACTIVE)"
signalling=fxs_ks
callerid=asreceived
echocancel = yes
group=1
context=incoming
channel => 3

;;; line="4 WCTDM/0/3 FXSKS (EC: MG2 - INACTIVE)"
signalling=fxs_ks
callerid=asreceived
echocancel = yes
group=2
context=incoming
channel => 4

and My extensions.conf :
[general]
static=yes
writeprotect=no
[internal]
include=>from-pstn

[from-pstn]
include=>incoming
include=>outgoing

[incoming]
exten => s,1,Answer()
exten => s,2,Echo()

[outgoing]
exten=> _9.,1,Dial(DAHDI/g1/${EXTEN:1},20)
exten=> _9.,n,Dial(DAHDI/g2/${EXTEN:1},20)
exten=> _9.,n,Hangup()

Thanks alot

Is there any reason that you are disqualified from support by Digium? If not, you should direct this to Digium, not the open source community. Details are in a sticky posting at the start of the forum.