There is no service available to complete the call

[Evanesce]

google voice says connected, don't understand why i can't make calls, help, thanks!

[MB..]

You've not really provided enough information for anyone to help you.

The message generally seems to mean that you are trying to dial out using a service that is not configured or not available, so possibly the number you are dialing is being routed to somewhere else (or nowhere).

And check this thread in case it helps:
http://www.obitalk.com/forum/index.php?topic=225.0