help with Digium TDM410p and multiple FXO

I've got a Trixbox setup and working with all IP based calling. I just bought a Digium TDM410P with 2 FXO ports. I want to route my outbound calls through these two analog lines and failover to the IP terminations. I followed the steps in Trixbox without tears and got the Digium card set up, recognized, and can even make calls with the ports...sort of. Here is the problem. I have two analog lines so I have set up two Trunks ZAP/g0 and Zap/2. In my outbound routes, I can make calls on both lines, but only if I only have one in the trunk sequence. If I put both lines in the trunk sequence, the first outbound call I make works, but a 2nd simultaneous call fails with "Call cannot be completed as dialed," almost like I took the phone off the hook and never dialed a number (it takes about 20 seconds to get the recording). If I switch the order, I get the same result. However, putting only one Zap line in the Trunk Sequence along with my IP Trunk, I can make as many simultaneous calls as I want. So, the quetion is, what do I need to do to route calls through both analog lines simultaneously? Here are my conf files:

zapata.conf

;
; Zapata telephony interface
;
; Configuration file

[trunkgroups]

[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

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
group=0
callgroup=1
pickupgroup=1
immediate=no

;faxdetect=both
faxdetect=incoming
;faxdetect=outgoing
;faxdetect=no

;Include genzaptelconf configs
#include zapata-auto.conf

group=1

;Include AMP configs
#include zapata_additional.conf

____________________________________
and zapata-auto.conf

; Autogenerated by /usr/sbin/genzaptelconf -- do not hand edit
; Zaptel Channels Configurations (zapata.conf)
;
; This is not intended to be a complete zapata.conf. Rather, it is intended
; to be #include-d by /etc/zapata.conf that will include the global settings
;

; Span 1: WCTDM/0 "Wildcard TDM410P Board 1" (MASTER)
;;; line="1 WCTDM/0/0"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel => 1
context=default

;;; line="2 WCTDM/0/1"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel => 2
context=default

Thanks,

Cameron