Hello and welcome to the forum... The best place to ask your question is actually here:
http://www.obitalk.com/forum/index.php?board=16.0 Same people seem to be more patient there
You will need to explain more than that. First, what OBi model do you have? What ports are connected (this question is relevant if you have 110 or 202; less for 100). "New" OBi needs to be set up with provider (otherwise you won't be able to make any calls). So - what are your providers.
What other settings you set up...
My post is already longer than yours; and I don't think it's fair. Help us help you by providing as much relevant information as possible