how can i configure voipian/voipax on trixbox

[zlotowinfo]

tried this but not works:

fromdomain=voipian.com
fromuser=login
host=sip.voipian.com
insecure=very
secret=password
trunk=yes
type=peer
user=login
username=login
dtmfmode=inband


one day works, second not, what is going on