Remotes Site with IAX

Asterisk Asterisk Support
1

I have a litlle problem with my IAX setup.
We have 3 sites. 1 main site with a T1 and 2 satellite site that connected with IAX to the main one.
The site 3 connect to the site 1. The site 2 connect to the site 1. The site 1 connect to the site 3. But the site 1 don’t connect to the site 2.

SITE 1 (MAIN) :

leia*CLI> iax2 show peers
Name/Username    Host                 Mask             Port          Status
5147878861/5147  (Unspecified)   (D)  255.255.255.255  0             Unmonitored
fax4/fax4        127.0.0.1       (D)  255.255.255.255  32771         Unmonitored
fax3/fax3        127.0.0.1       (D)  255.255.255.255  32773         Unmonitored
fax2/fax2        127.0.0.1       (D)  255.255.255.255  4570          Unmonitored
fax/fax          127.0.0.1       (D)  255.255.255.255  32772         Unmonitored
LAVAL/OFFICE     XXX.XXX.XXX.XXX   (S)  255.255.255.255  4569 (T)      OK (23 ms)
>>>DOWNTOWN/OFFICE  XXX.XXX.XXX.XXX  (S)  255.255.255.255  4569 (T)  (E) UNREACHABLE<<<

SITE 2 :

SERVEUR1*CLI> iax2 show peers
Name/Username    Host                 Mask             Port          Status
OFFICE/DOWNTOWN  XXX.XXX.XXX.XXX   (S)  255.255.255.255  4569      (E) OK (22 ms)

SITE 3 :

Betty*CLI> iax2 show peers
Name/Username    Host                 Mask             Port          Status
OFFICE/LAVAL     XXX.XXX.XXX.XXX   (S)  255.255.255.255  4569      (E) OK (21 ms)

My iax.conf :

SITE 1 :

[DOWNTOWN]
type=friend
username=OFFICE
secret=XXXXXXXX
auth=md5
host=XXX.XXX.XXX.XXX
context=fromdowntown
peercontext=fromoffice
qualify=yes
trunk=yes
encryption=aes128
port=4569
[LAVAL]
type=friend
username=OFFICE
secret=XXXXXXX
auth=md5
host=XXX.XXX.XXX.XXX
context=fromlaval
peercontext=fromoffice
qualify=yes
trunk=yes
encryption=aes128

SITE 2 :

[OFFICE]
type=friend
username=DOWNTOWN
secret=XXXXXXX
auth=md5
host=XXX.XXX.XXX.XXX
context=fromoffice
peercontext=fromdowntown
qualify=yes
trunk=yes
encryption=aes128
port=4569

My biggest problem is there is no log or error messages or any message at all about the UNREACHABLE peer. Anyone have an idea about what im doing wrong ?
Thanks