Setup outgoing sip calls

i hope somone can help me, i am new to asterisk
i have install asteriskNOW beta.
i have added a service supplier (SIP)
and added a call rule and added this suppier to the rule.
when i try calling a phone number external to the PBX i get and eror that the service is unavailible.
in the logs i get these entries

[Mar 29 19:18:45] WARNING[4937] channel.c: No channel type registered for ‘’
[Mar 29 19:18:45] WARNING[4937] app_dial.c: Unable to create channel of type ‘’ (cause 66 - Channel not implemented)
[Mar 29 19:18:55] WARNING[4937] pbx.c: Timeout, but no rule ‘t’ in context ‘numberplan-custom-1’

You realize that there’s an AsteriskNow forum. Better chance there.

my apoligies, i’ll try there.