IAX2 trunk issue

Dear All
i have been trying to make a IAX2 Trunk to save bandwidth. i have given my configuration information. but i dont think trunk ed is extablished. because it taking too much bandwidth and on iax2 show peers there is no (t).
can you guys help me out pls?
===================server 1======================
[peer1]
host=192.168.1.2
username=user1
secret=yellow470
type=peer
qualify=yes
trunk=yes
notransfer=yes
allow=g729
allow=g723

[user2]
secret=yellow470
type=user
trunk=yes
notransfer=yes
context=from-trunk
allow=g729
allow=g723

=======================servver 2================
[peer2]
;disallow=all
host=192.168.1.100
username=user2
secret=yellow470
type=peer
qualify=yes
trunk=yes
notransfer=yes

[user1]
secret=yellow470
type=user
context=from-trunk
trunk=yes
notransfer=yes
allow=g729
allow=g723

======== server 1 iax2 show peers
peer1/user 192.168.1.100 (S) 255.255.255.255 4569 OK (2 ms)

======== server 2 iax2 show peers
peer2/user 192.168.1.2 (S) 255.255.255.255 4569 OK (2 ms)

both server running on Asterisk 1.6.0.13, Copyright © 1999 - 2008 Digium, Inc. and others.
server 1:
ztdummy 9256 0
zaptel 190852 11 xpp,wcusb,wctdm,wcfxo,wctdm24xxp,wcte11xp,wct1xxp,wcte12xp,wct4xxp,tor2,ztdummy

server 2:
ztdummy 38856 0
zaptel 231496 11 wcusb,ztdummy,xpp,wctdm,wcfxo,wctdm24xxp,wcte11xp,wct1xxp,wcte12xp,wct4xxp,tor2