some problems with sip and phone

hi folks! i have some problems:

first of all my config:

my system is wired with a dlink router, i am using redhat and normal asterisk!
my phones are aastra 480i.

now my problems:
when i try to connect my phone with asterisk, i always get this msg:

“notice[1903]: chan_sip.c:8802 handle_request_register: registratiopm from ‘1234 ‘ failed for ‘192.168.0.121’”

my asterisk server ip is: 192.168.0.136
phone ip: 192.168.0.121

i am using a tdm400p

zapata.conf
——————————————————————–
[channels]

busydetect=1

busycount=7

relaxdtmf=yes

callwaiting=yes

callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
usecallerid=yes
echocancel=yes
echocancelwhenbridged=yes
rxgain=0.0
txgain=0.0
group=1
pickupgroup=1-4
immediate=no
context=bell
signalling=fxs_ks
callerid=asreceived
channel=2
context=sip
group=2
signalling=fxs_ks
callerid=”Phone 1″
channel=3

————————–

sip.conf

————————————-

[phone1]
type=friend
host=dynamic
defaultip=192.168.0.121
secret=1234
dtmfmode=rfc2833
context=sip
callerid=”Phone 1″

———————-

extensions.conf

————————–

[general]

[sip]
exten => 1234,1,Dial(SIP/phone1,20)

——————————-

my aastra.cfg (for the telephone, using tftp)

——————————-

sip registration periso: 300
sip rtp port: 3000
sip registrar ip: 192.169.0.136
sip registrar port: 5060
sip digit time out: 4
time server disabled: 1

sip line1 auth name: 1234
sip line1 password: 1234
sip line1 user name: 1234
sip line1 display name: 1234
sip line1 screen name: 1234

———————–

when i start asterisk and type in “sip show peers” i get

:

name/username/status host dyn nat acl mask port
phone1/ /unmonitored unspecified d 255.255.255.255 0

would be nice if anyone hase some awnsers for me and can help me

thanks

widi