[Krotn]

We've seen the same exception before as well. Generally when it's happened to me it's that NetBeans is configured for the wrong team number, the firewall is blocking the connection, there's a problem with the ip settings on the development computer.

It looks like NetBeans is set up right and you said that you tried disabling the firewall (maybe double check that you turned it off on both public and private networks). You could also let the driver station set up your ip for you by hitting the "Choose NIC" button under setup. Also, did you image your cRIO, was there an error during that possibly?