[asterisk-users] Distinctive ring detection not detecting ring cadences

[Exploding Lemur]

I'm using Asterisk 1.4.5 (will try 1.4.6 on Thursday, but I don't see
anything in the changelog after the 1.4.5 release dealing with
distinctive ring), zaptel 1.4.3, and wanpipe 2.3.4-10 with a Sangoma
A200 card.  I enabled usedistinctiveringdetection in zapata.conf.
However, on the Asterisk console, the output I get is:
    -- Detected ring pattern: 0,0,0
It would appear that Asterisk is just not getting ring info from the
card.  It worked a few times, but not very reliably, and now not at
all.  Any thoughts on what the issue may be?  Is there other info I
can provide that will help?

Config files pasted below:

zapata.conf:
;autogenerated by /usr/local/sbin/config-zaptel  do not hand edit
;Zaptel Channels Configurations (zapata.conf)
;
;For detailed zapata options, view /etc/asterisk/zapata.conf.orig

[trunkgroups]

[channels]
context=default
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
rxgain=5.0
txgain=-7.0
group=1
callgroup=1
pickupgroup=1
immediate=no
usedistinctiveringdetection=yes
dring1=360,230,193
dring1context=from-intercom
dring2=205,93,0
dring2context=from-zaptel
dring3=0,0,0
dring3context=from-zaptel

;Sangoma A200 [slot:6 bus:1 span:1]
context=from-zaptel
group=0
signalling = fxs_ks
channel => 1-4

zaptel.conf:
# Autogenerated by /usr/local/sbin/sangoma/setup-sangoma -- do not hand edit
# Zaptel Channels Configurations (zaptel.conf)
#
loadzone=us
defaultzone=us

#Sangoma A200 [slot:6 bus:1 span:1]
fxsks=1
fxsks=2
fxsks=3
fxsks=4

wanpipe1.conf:
#================================================
# WANPIPE1 Configuration File
#================================================
#
# Date: Mon Jul 31 17:10:23 EDT 2006
#
# Note: This file was generated automatically
#       by /usr/local/sbin/setup-sangoma program.
#
#       If you want to edit this file, it is
#       recommended that you use wancfg program
#       to do so.
#================================================
# Sangoma Technologies Inc.
#================================================

[devices]
wanpipe1 = WAN_AFT_ANALOG, Comment

[interfaces]
w1g1 = wanpipe1, , TDM_VOICE, Comment

[wanpipe1]
CARD_TYPE       = AFT
S514CPU         = A
CommPort        = PRI
AUTO_PCISLOT    = NO
PCISLOT         = 6
PCIBUS          = 1
FE_MEDIA        = FXO/FXS
TDMV_LAW        = MULAW
TDMV_OPERMODE   = FCC
MTU             = 1500
UDPPORT         = 9000
TTL             = 255
IGNORE_FRONT_END = NO
TDMV_SPAN       = 1

[w1g1]
ACTIVE_CH       = ALL
TDMV_ECHO_OFF   = NO
TDMV_HWEC       = NO