Um ... let's see if I get this.
You just now installed ... on an OS that's four years old with vicidial code that's a full version behind (and was never formally released, it's a "between" versions codebase that was only ever Trunk).
Your post subject is "help" which gives no information about the topic being discussed.
Your subject also contains "vicibox" but your OS is Ubuntu 10.04 which is NOT a vicibox install. You either made a mistake on the OS or in using the word "Vciibox" (which is an installer that will install Vicidial on OpenSuSE, not Ubuntu, available at Vicibox.com).
And you posted enough detail to demonstrate that you are familiar with the asterisk command line and the necessary information to tell us about your system (except for the link to your installation instructions OR your vicibox installer version, either of which would have cleared up quite a bit).
LOL You're obviously trying very hard, so I'll give you the benefit of the doubt.

Which leads us to: no response to a critical packet is usually a networking problem. Could be firewall, loss of internet, carrier fail, lots of things.
But since this is a fresh install, My Advice would be to proceed to Vicibox.com and download and install the latest Vicibox, which will result in a brand new Vicidial server with the latest code and it will be very unlikely to have the error you quoted above.
There is a PDF on Vicibox.com with install instructions. Then you can switch to the Vicidial Manager's Manual (from EFLO.net). Download the Free Version, and start at page one. Don't skip anything. Do all the exercises. Bring us the page you have a problem on, share the configuration settings involved, what you did, and what you Expected to happen, and of course what actually happened. Plus the Page/Line number of the manual where you hit your pothole. And we'll walk you through it.
Happy Hunting
