UC500.com

Hi, I hope thant everyone isn't on holidays ... :)
I actually use a callmanager express on a 2811 with 2 T0. I decided to use a SIP TRUNK. So i subscribe at openip and they gave me some informations to configure the trunk :

Login .....
Mot de passe .....
Server sip2.voip-centrex.net
Numeros SDA .........

I try to configure my CME now :

dial-peer voice 9999 voip
translation-profile outgoing appelsortantsip
destination-pattern 9T
voice-class codec 1
session protocol sipv2
session target sip-server
dtmf-relay rtp-nte
no vad
!
!
sip-ua
credentials username ..... password .......................... realm voip-centrex.net
nat symmetric role active
no remote-party-id
registrar dns:sip2.voip-centrex.net expires 3600
sip-server dns:sip2.voip-centrex.net

and my translation rules :

voice translation-rule 9000
rule 1 /^9\(.*\)/ /\1/
!
voice translation-rule 9001
rule 1 /.*/ /123456789/

voice translation-profile appelsortantsip
translate calling 9001
translate called 9000

I call the SIP provider and he tells me thant i am not registred on his server. How can I force it ? My conf seem's to be bad ?