TDM400P Dialtone problem

Hi,
I have a TDM400P (2FXS and 2FXO) installed on my asterisk (1.4.18.1) Zaptel (1.4.9.2), below are my configurations and some diagnosis I did. The problem is when I connect an analogue headset on either of the FXS channels I don’t get a dialtone, I can’t call any of the sip clients or even call my echo test, number, which is an context included in that of the FXS port.
How can I solve this problem? Please assist.

zaptel.conf

Span 1: WCTDM/0 “Wildcard TDM400P REV I Board 1” (MASTER)

fxoks=1
fxoks=2
fxsks=3
fxsks=4

Global data

loadzone = us
defaultzone = us

zapata.conf
[trunkgroups]
; define any trunk groups

[channels]
; hardware channels

;language=en
;context=from-zaptel
;signalling=fxs_ks
;rxwink=300 ; Atlas seems to use long (250ms) winks
;
; Whether or not to do distinctive ring detection on FXO lines
;
usedistinctiveringdetection=yes
; default
usecallerid=yes
hidecallerid=no
callwaiting=no
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no
;echotraining=800
echotraining=yes
rxgain=0.0
txgain=0.0

;group=0
callgroup=1
pickupgroup=1
immediate=no
context=phone
signalling=fxo_ks
channel => 1
;callerid=
;mailbox=
;group=
context=phone

;;; line="2 WCTDM/0/1 FXOKS (In use)"
signalling=fxo_ks
;context=phone
channel => 2
;callerid=
;mailbox=
;group=
context=incoming

;;; line="3 WCTDM/0/2 FXSKS (In use)"
signalling=fxs_ks
;callerid=asreceived
;group=0
channel => 3
context=incoming

;;; line="4 WCTDM/0/3 FXSKS (In use)"
signalling=fxs_ks
;callerid=asreceived
;group=0
;context=incoming
channel => 4
;context=default

[root@localhost /]# /sbin/ztcfg -vv

Zaptel Version: 1.4.9.2
Echo Canceller: MG2
Configuration

Channel map:

Channel 01: FXO Kewlstart (Default) (Slaves: 01)
Channel 02: FXO Kewlstart (Default) (Slaves: 02)
Channel 03: FXS Kewlstart (Default) (Slaves: 03)
Channel 04: FXS Kewlstart (Default) (Slaves: 04)

4 channels to configure.

Asterisk CLI
core score show channeltypes
Type Description Devicestate Indications Transfer


Feature Feature Proxy Channel Driver no yes no
IAX2 Inter Asterisk eXchange Driver (Ver 2) yes yes yes
Local Local Proxy Channel Driver yes yes no
SIP Session Initiation Protocol (SIP) yes yes yes
Phone Standard Linux Telephony API Driver no yes no
MGCP Media Gateway Control Protocol (MGCP) yes yes no
Agent Call Agent Proxy Channel yes yes no

7 channel drivers registered.

*CLI> module reload chan_zap.so
No such module ‘chan_zap.so’

*CLI>