[Asterisk-Users] How to connect to IPTEL.ORG

[Alex Piqueras]

Hi, how I can connect Astrisk to my iptel account???

I have try to this configuration, but it doesn't work:
In sip.conf:

register => my_account_name:xxxx at iptel.org

[iptel.org]
type=friend
host=iptel.org
fromuser=my_account_name
secret=xxxx
nat=yes

in extensions.conf:

[fromiptel]
exten => my_iptel_number,1,Dial(SIP/phone1,20,r)

[toiptel]
exten => _002.,1,SetCallerId,my_iptel_number
exten => _002.,2,Dial(SIP/my_iptel_number at iptel.org/${EXTEN:3},60,r)
exten => _002.,3,Congestion

What is it wrong????

Note: I'm sorry for my english.